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MEDIUM severity

Weblate exposes personal IP address via e-mailGHSA-4qqf-9m5c-w2c5

MEDIUMFix: WeblateOrg/weblate#15102

GHSA-4qqf-9m5c-w2c5 is a medium-severity (CVSS 5.3) CWE-359 vulnerability in weblate. A fix is available for weblate — see the affected versions and patch details below.

Also known asCVE-2025-49134PYSEC-2026-2038
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 5, 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-4qqf-9m5c-w2c5.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs25th percentile — riskier than 25% of all scored CVEsHighest risk
0.00%0.27%0.55%0.82%0.3%0.3%May 26Sep 26Nov 26

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
🐍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 audit log notifications included the full IP address of the acting user. This could be obtained by third-party servers such as SMTP relays, or spam filters.

Patches

This issue has been addressed in Weblate 5.12 via https://github.com/WeblateOrg/weblate/pull/15102.

References

Thanks to micael1 for reporting this issue at HackerOne.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIweblateall versions5.12pip install --upgrade 'weblate==5.12'

Affected Products

1 product · 1 configurations
Application
weblateweblate
< 5.12
range

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 5.12 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-4qqf-9m5c-w2c5 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 audit log notifications included the full IP address of the acting user. This could be obtained by third-party servers such as SMTP relays, or spam filters. ### Patches This issue has been addressed in Weblate 5.12 via https://github.com/WeblateOrg/weblate/pull/15102. ### References Thanks to [micael1](https://hackerone.com/micael1) for reporting this [issue at HackerOne](https://hackerone.com/reports/3179850).
O3 Security · Impact-Aware SCA

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Weblate exposes personal IP address via e-mail