CVE-2026-13707

EUVD-2026-41033
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.6 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 15.32%
Affected Products (NVD)
VendorProductVersion
mediawikimediawiki
1.43.0 ≤
𝑥
< 1.43.9
mediawikimediawiki
1.44.0 ≤
𝑥
< 1.44.6
mediawikimediawiki
1.45.0 ≤
𝑥
< 1.45.4
mediawikimediawiki
1.46.0:rc0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://phabricator.wikimedia.org/T428324