Vulnerability · Published Jul 1, 2026 · Assigned by wikimedia-foundation
CVE-2026-58029Full Account Takeover from BotPasswords and OAuth via action=changeauthenticationdata
Medium 5.3
In plain English
A medium-severity improper authentication in MediaWiki from Wikimedia Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Api/ApiChangeAuthenticationData.Php, includes/Api/ApiLinkAccount.Php, includes/Api/ApiRemoveAuthenticationData.Php, includes/Specials/SpecialLinkAccounts.Php, includes/Specials/SpecialUnlinkAccounts.Php. This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | mediawiki | no fix listed | DEBIAN-CVE-2026-58029 |
| Debian:13 | mediawiki | 1:1.43.9+dfsg-1~deb13u1 | DEBIAN-CVE-2026-58029 |
| Debian:14 | mediawiki | 1:1.43.9+dfsg-1 | DEBIAN-CVE-2026-58029 |
| Ubuntu:25.10 | mediawiki | no fix listed | UBUNTU-CVE-2026-58029 |
| Ubuntu:26.04:LTS | mediawiki | no fix listed | UBUNTU-CVE-2026-58029 |
| Ubuntu:26.10 | mediawiki | no fix listed | UBUNTU-CVE-2026-58029 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Wikimedia Foundation | MediaWiki | * – before 1.46.0, 1.45.4, 1.44.6, 1.43.9 |
Weakness: CWE-287 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N