Insecure Direct Object Reference in Weblate Localization Tool
CVE-2026-27457

4.3MEDIUM

Key Information:

Vendor

Weblateorg

Status
Weblate
Vendor
CVE Published:
26 February 2026

What is CVE-2026-27457?

Weblate, a popular web-based localization tool, suffered from a vulnerability in its REST API that allowed authenticated users, and potentially unauthenticated ones if login requirements were not enforced, to access and list all addons across various projects. This lack of appropriate permission checks in the 'AddonViewSet' created an insecure direct object reference, exposing sensitive data to unauthorized users. The vulnerability was addressed in version 5.16.1, which implemented necessary permission checks to restrict access to addons based on user credentials.

Affected Version(s)

weblate < 5.16.1

References

https://github.com/WeblateOrg/weblate/security/advisories...
x_refsource_CONFIRM
https://github.com/WeblateOrg/weblate/pull/18107
x_refsource_MISC
https://github.com/WeblateOrg/weblate/pull/18164
x_refsource_MISC

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.