🛡️ CVE-2026-33435 — weblate

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-23 OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Weblate: Remote code execution during backup restoration

Impact

The project backup didn't filter Git and Mercurial configuration files and this could lead to remote code execution under certain circumstances.

Patches

  • https://github.com/WeblateOrg/weblate/pull/18549

Workarounds

The project backup is only accessible to users who can create projects. Restricting access to this limits scope of the vulnerability.

References

This issue was reported by [ggamno](https://hackerone.com/ggamno) via HackerOne.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs administrative privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2026-33435 is classified as CWE-23: Relative Path Traversal. Relative path sequences in user input are not neutralised, so requests can climb out of the intended directory.

Affected software

CVE-2026-33435 is recorded against 1 package.

  • weblate (fixed in 5.17)

Timeline and source

Published on 16 April 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from OSV.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Package)
github.com (Web)

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CWE CWE-23
Public Exploit ✅ No
Source OSV
Published 2026-04-16
Updated 2026-08-12
Modified 2026-06-17

Affected Packages

Software From version Fixed in
weblate — 5.17

Similar Threats

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