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🐍 PyPI

GHSA-9xv4-r2hf-26gh

HIGH

GHSA-9xv4-r2hf-26gh is a high-severity (CVSS 7.5) Improper Input Validation vulnerability in mercurial. O3 Security confirms whether GHSA-9xv4-r2hf-26gh is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Mercurial Improper Input Validation vulnerability

Also known asCVE-2018-13346PYSEC-2018-88
Published
May 13, 2022
Updated
Sep 25, 2024
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed

Real-World Exposure

1 pkg affected
🐍mercurial

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

The mpatch_apply function in mpatch.c in Mercurial before 4.6.1 incorrectly proceeds in cases where the fragment start is past the end of the original data, aka OVE-20180430-0004.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPImercurialall versions4.6.1

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mercurial. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update mercurial to 4.6.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-9xv4-r2hf-26gh is resolved across your whole dependency graph.

  3. 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.

  4. How O3 protects you

    O3 pinpoints whether GHSA-9xv4-r2hf-26gh is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-9xv4-r2hf-26gh. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

The `mpatch_apply` function in `mpatch.c` in Mercurial before 4.6.1 incorrectly proceeds in cases where the fragment start is past the end of the original data, aka OVE-20180430-0004.
O3 Security · Impact-Aware SCA

Is GHSA-9xv4-r2hf-26gh in your dependencies?

O3 detects GHSA-9xv4-r2hf-26gh across PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.