How severe is CVE-2023-46302?

CVE-2023-46302 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2023-46302?

CVE-2023-46302 affects the following packages: apache-submarine (PyPI). Ecosystems affected: PyPI.

How do I fix CVE-2023-46302?

Update apache-submarine to 0.8.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-46302 is resolved across your whole dependency graph.

How do I detect CVE-2023-46302 in my PyPI dependencies?

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

How do I mitigate CVE-2023-46302 if there is no patch (or I can't update yet)?

Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.

Is CVE-2023-46302 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2023-46302, 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-2023-46302?

CVE-2023-46302 has an EPSS (Exploit Prediction Scoring System) score of 1.8%, placing it in the 78th 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-2023-46302?

CVE-2023-46302 is classified as Deserialization of Untrusted Data (CWE-502). 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-2023-46302 published, and has it been updated?

CVE-2023-46302 was published on November 20, 2023 and was last updated on October 28, 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

CRITICAL severity

CVE-2023-46302 — apache-submarine

CRITICALFix: apache/submarine#1054

CVE-2023-46302 is a critical-severity (CVSS 9.8) Deserialization of Untrusted Data vulnerability in apache-submarine. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for apache-submarine — see the affected versions and patch details below.

Apache Submarine: Fix CVE-2022-1471 SnakeYaml unsafe deserialization

Also known asGHSA-8hcr-5x2g-9f7jPYSEC-2023-240

Published

Nov 20, 2023

Updated

Oct 28, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

1 known

Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.8%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs78th percentile — riskier than 78% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

🐍apache-submarine

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

Apache Software Foundation Apache Submarine has a bug when serializing against yaml. The bug is caused by snakeyaml https://nvd.nist.gov/vuln/detail/CVE-2022-1471 .

Apache Submarine uses JAXRS to define REST endpoints. In order to handle YAML requests (using application/yaml content-type), it defines a YamlEntityProvider entity provider that will process all incoming YAML requests. In order to unmarshal the request, the readFrom method is invoked, passing the entityStream containing the user-supplied data in submarine-server/server-core/src/main/java/org/apache/submarine/server/utils/YamlUtils.java.

We have now fixed this issue in the new version by replacing to jackson-dataformat-yaml. This issue affects Apache Submarine: from 0.7.0 before 0.8.0. Users are recommended to upgrade to version 0.8.0, which fixes this issue. If using the version smaller than 0.8.0 and not want to upgrade, you can try cherry-pick PR https://github.com/apache/submarine/pull/1054 and rebuild the submart-server image to fix this.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`apache-submarine`	≥ 0.7.0&&< 0.8.0	0.8.0`pip install --upgrade 'apache-submarine==0.8.0'`

Affected Products

1 product · 1 configurations

Application

submarineapache

≥ 0.7.0 && < 0.8.0

range

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.

Apache Software Foundation Apache Submarine has a bug when serializing a…

issues.apache.orgNVDNov 2023

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for apache-submarine, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update apache-submarine to 0.8.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-46302 is resolved across your whole dependency graph.
Workarounds
Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.

Frequently Asked Questions

Apache Software Foundation Apache Submarine has a bug when serializing against yaml. The bug is caused by snakeyaml https://nvd.nist.gov/vuln/detail/CVE-2022-1471 . Apache Submarine uses JAXRS to define REST endpoints. In order to handle YAML requests (using application/yaml content-type), it defines a YamlEntityProvider entity provider that will process all incoming YAML requests. In order to unmarshal the request, the readFrom method is invoked, passing the entityStream containing the user-supplied data in `submarine-server/server-core/src/main/java/org/apache/submarine/server/utils/Yaml

O3 Security · Impact-Aware SCA

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Find it across PyPI, including transitive dependencies.

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CVSS Score

9.8/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Raw vector

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

CWE Classification

CWE-502Deserialization of Untrusted Data

Weaponization

No Nuclei template or Metasploit module yet. 1 public proof-of-concept reference is listed on this page.

Timeline

Disclosed

Nov 20, 2023

First exploit

Nov 30, 2023

Last updated

Oct 28, 2026

Identifiers

CVE-2023-46302

GHSA-8hcr-5x2g-9f7j

PYSEC-2023-240

References

Advisorygithub.com · CVE 2023 46302.json Advisorylists.apache.org · zf0wppzh239j4h131hm1dbswfnztxrr5 Advisorynvd.nist.gov · CVE 2023 46302 Fixgithub.com Reportissues.apache.org · SUBMARINE 1371 Webgithub.com · PYSEC 2023 240.yaml

Related vulnerabilities

Also affects apache-submarine

This CVE is critical severity; 2 of 3 other CVEs affecting apache-submarine are rated as high or higher (top: critical).

CVE-2024-36265CVE-2024-36264CVE-2023-37924

Same weakness: CWE-502

This CVE is critical severity — higher than any of the other 5 CVEs with CWE-502 (highest there: high).

CVE-2026-115878CVE-2026-62848CVE-2026-115912CVE-2026-116580CVE-2026-114608Browse all CWE-502

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 28, 2026

CVE-2023-46302 — apache-submarine

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2023-46302 in your dependencies?