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CVE-2026-77573: CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition in WeblateOrg weblate

0
Low
VulnerabilityCVE-2026-77573cvecve-2026-77573cwe-367cwe-918
Published: 08/26/2026 (08/26/2026, 20:48:48 UTC)
Source: CVE Database V5
Vendor/Project: WeblateOrg
Product: weblate

Description

Weblate is a web-based continuous localization platform used to manage software translations. In versions prior to 2026.8, a user permitted to manage component repository URLs can perform server-side request forgery against internal services through DNS rebinding during VCS operations. Weblate validates the hostname's first DNS resolution, but the external VCS clients that later connect perform a separate DNS lookup, so an attacker-controlled hostname that initially resolves to a public address can be re-pointed to an internal or private address before the connection is made. By triggering a clone, fetch, push, or similar remote operation, the attacker can cause Weblate to reach internal VCS-compatible services and potentially expose private repository contents. Installations that permit untrusted repository hostnames while using VCS_RESTRICT_PRIVATE=True are affected. This issue is fixed in version 2026.8.

CVSS v3.1

Score 3.5low

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N

Technical Details

Data Version
5.2
Assigner Short Name
GitHub_M
Date Reserved
2026-08-20T20:35:30.147Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 6a8f55a2acd9273b496333d7

Added to database: 08/26/2026, 21:07:46 UTC

Last updated: 08/26/2026, 22:02:51 UTC

Views: 5

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