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MEDIUM severity

Private Weblate projects vulnerable to observable object existence disclosure via globally scoped object lookupsGHSA-2p9g-x3cv-5hh4

MEDIUMFix: WeblateOrg/weblate#19971

GHSA-2p9g-x3cv-5hh4 is a medium-severity (CVSS 4.3) CWE-203 vulnerability in weblate. A fix is available for weblate — see the affected versions and patch details below.

Also known asCVE-2026-55227PYSEC-2026-3941
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 23, 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 GHSA-2p9g-x3cv-5hh4.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs24th percentile — riskier than 24% of all scored CVEsHighest risk
0.00%0.27%0.55%0.82%0.2%0.3%0.3%Sep 26Oct 26Oct 26

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

How urgent is this, really

GHSA-2p9g-x3cv-5hh4 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 394,803 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

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

Weblate is a web-based localization tool. In versions prior to 2026.7, several endpoints look up objects in a globally scoped manner rather than restricting the lookup to projects the user can access, so they return HTTP 403 (Forbidden) instead of 404 (Not Found) when a user requests an object they are not authorized to see. This difference lets unauthorized users infer whether a given object exists in a private Weblate project. The issue has been fixed in version 2026.7.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIweblateall versions2026.7pip install --upgrade 'weblate==2026.7'

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, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update weblate to 2026.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-2p9g-x3cv-5hh4 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.

Frequently Asked Questions

### Impact The several endpoints could leak object existence information to users who had no access to it by HTTP status code 403 instead of 404. ### Patches * https://github.com/WeblateOrg/weblate/pull/19971 ### References Thanks to Yaohui Wang for reporting this via GitHub.
O3 Security · Impact-Aware SCA

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Private Weblate projects vulnerable to observable object…