Weblate: Missing access control for the AddonViewSet API exposes all addon configurations

Description

Impact

Users were able to obtain add-on configuration via API.

Patches

  • https://github.com/WeblateOrg/weblate/pull/18107
  • https://github.com/WeblateOrg/weblate/pull/18164

References

Weblate thanks @lighthousekeeper1212 for responsible disclosure.

Basic information

Type
reviewed
Severity
medium
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2026-02-26 19:45:06 UTC
Updated
2026-02-27 21:59:16 UTC
GitHub reviewed
2026-02-26 19:45:06 UTC
NVD published
2026-02-26

EPSS Score

Score Percentile
0.03% 8.75%

CVSS Scores

Base score Version Severity Vector
4.3 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.

Identifiers

CWEs

CWE id Name
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-862 Missing Authorization

Credits

  • nijel (remediation_developer)

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
pip weblate < 5.16.1 5.16.1

References

cvelogic Threat Intelligence