How severe is CVE-2025-1386?

No CVSS score has been assigned to CVE-2025-1386 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2025-1386?

CVE-2025-1386 affects the following packages: github.com/ClickHouse/ch-go (Go). Ecosystems affected: Go.

How do I fix CVE-2025-1386?

Update github.com/ClickHouse/ch-go to 0.65.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-1386 is resolved across your whole dependency graph.

How do I detect CVE-2025-1386 in my Go dependencies?

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

How do I mitigate CVE-2025-1386 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.

Is CVE-2025-1386 actively exploited in the wild?

No public exploit code has been indexed for CVE-2025-1386 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2025-1386?

CVE-2025-1386 has an EPSS (Exploit Prediction Scoring System) score of 0.4%, placing it in the 35th 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-2025-1386?

CVE-2025-1386 is classified as CWE-444 (CWE-444). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2025-1386 published, and has it been updated?

CVE-2025-1386 was published on April 11, 2025 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.

🐹 Go

Not in CISA KEV

CVE-2025-1386 — ch-go

Fix: ClickHouse/ch-go@0e83566

CVE-2025-1386 is a CWE-444 vulnerability in github.com/ClickHouse/ch-go. A fix is available for github.com/ClickHouse/ch-go — see the affected versions and patch details below.

Query smuggling in ch-go library

Also known asGHSA-m454-3xv7-qj85GO-2025-3603

Published

Apr 11, 2025

Updated

Oct 28, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-1386.

EPSS Exploitation Probability

via FIRST.org ↗

0.4%probability of exploitation in next 30 days

Lower Risk+0.01%

Lower risk than most CVEs35th percentile — riskier than 35% of all scored CVEsHighest risk

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

Real-World Exposure

1 pkg affected

🐹github.com/ClickHouse/ch-go

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

Description

Impact

When using the ch-go library, under a specific condition when the query includes a large, uncompressed malicious external data, it is possible for an attacker in control of such data to smuggle another query packet into the connection stream.

Patches

If you are using ch-go library, we recommend you to update to at least version 0.65.0.

Credit

This issue was found by lixts and reported through our bugcrowd program.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/ClickHouse/ch-go`	all versions	0.65.0`go get github.com/ClickHouse/ch-go@v0.65.0`

Affected Products

1 product · 1 configurations

Application

chclickhouse

< 0.65.0

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/ClickHouse/ch-go, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/ClickHouse/ch-go to 0.65.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-1386 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.

Frequently Asked Questions

### Impact When using the ch-go library, under a specific condition when the query includes a large, uncompressed malicious external data, it is possible for an attacker in control of such data to smuggle another query packet into the connection stream. ### Patches If you are using ch-go library, we recommend you to update to at least version 0.65.0. ### Credit This issue was found by lixts and reported through our bugcrowd program.

O3 Security · Impact-Aware SCA

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