What is the CVSS score of CVE-2026-21889?

CVE-2026-21889 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.0%.

Which versions of Weblate are affected by CVE-2026-21889?

Organizations using Weblate face notable risk from CVE-2026-21889, a improper access control vulnerability rated CVSS 7.5. Exploitation could compromise the security of affected deployments.. A patch is available.

How to fix or mitigate CVE-2026-21889?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Vendor patch is available.

Weblate CVE-2026-21889

HIGH

Improper Access Control (CWE-284)

2026-01-14 security-advisories@github.com

GHSA-3g2f-4rjg-9385

Authentication Bypass Weblate Suse

7.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SUSE

HIGH

qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

Patch released

Jan 23, 2026 - 14:49 nvd

Patch available

CVE Published

Jan 14, 2026 - 17:16 nvd

HIGH 7.5

DescriptionGitHub Advisory

Weblate is a web based localization tool. Prior to 5.15.2, the screenshot images were served directly by the HTTP server without proper access control. This could allow an unauthenticated user to access screenshots after guessing their filename. This vulnerability is fixed in 5.15.2.

AnalysisAI

Weblate versions prior to 5.15.2 expose screenshot images through the web server without authentication controls, enabling unauthenticated attackers to retrieve sensitive screenshots by predicting their filenames. This improper access control flaw affects all users whose screenshot content should be restricted. A patch is available in version 5.15.2 and later.

Technical ContextAI

Classified as CWE-284 (Improper Access Control). Affects Weblate. Weblate is a web based localization tool. Prior to 5.15.2, the screenshot images were served directly by the HTTP server without proper access control. This could allow an unauthenticated user to access screenshots after guessing their filename. This vulnerability is fixed in 5.15.2.