CVE-2026-13707

Session fixation attacks on improperly configured OAuth 1.0a tools

State: Published
Severity: 0.0 None
Published: Jul 1, 2026
Updated: Jul 1, 2026
Reserved: Jun 29, 2026

Description

Session fixation vulnerability in Wikimedia Foundation OAuth.

This vulnerability is associated with program files src/Backend/MWOAuthServer.Php.

This issue affects OAuth: from * through 1.46.0, 1.45.4, 1.44.6, 1.43.9.

Scores

CVSS	Score	Vector	Source
4.0	0.0 None	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N	wikimedia-foundation

Weaknesses

CWE-384 Session fixation

Affected Products

Product	Versions
OAuthWikimedia Foundation	1.46.0, 1.45.4, 1.44.6, 1.43.9 and earlierAffected

References

https://phabricator.wikimedia.org/T428324

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