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🐍 PyPI

GHSA-f8hv-g549-hwg2

MEDIUM

GHSA-f8hv-g549-hwg2 is a medium-severity (CVSS 4.1) vulnerability in weblate. O3 Security confirms whether GHSA-f8hv-g549-hwg2 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Weblate: SSRF via the webhook add-on using unprotected fetch_url()

Also known asCVE-2026-39845PYSEC-2026-156
Published
Apr 16, 2026
Updated
Jun 8, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed

Blast Radius

1 pkg affected
🐍weblate

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

Impact

The webhook add-on did not utilize existing SSRF protection.

Patches

Workarounds

Disabling the add-on would avoid misusing this.

References

Thanks to @Lihfdgjr for reporting this via GitHub.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIweblateall versions5.17

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for weblate. 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 weblate to 5.17 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-f8hv-g549-hwg2 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-f8hv-g549-hwg2 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-f8hv-g549-hwg2. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

### Impact The webhook add-on did not utilize existing SSRF protection. ### Patches * https://github.com/WeblateOrg/weblate/pull/18815 ### Workarounds Disabling the add-on would avoid misusing this. ### References Thanks to @Lihfdgjr for reporting this via GitHub.
O3 Security · Impact-Aware SCA

Is GHSA-f8hv-g549-hwg2 in your dependencies?

O3 detects GHSA-f8hv-g549-hwg2 across PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.