Vulnerability · Published Jul 1, 2026 · Assigned by wikimedia-foundation
CVE-2026-58025Remote Code Execution via Unsafe Deserialization in LogItem Import
Medium 5.9
In plain English
A medium-severity unsafe deserialization 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 0.5% (higher than 43% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official description
Deserialization of untrusted data vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Import/WikiImporter.Php, includes/Import/WikiRevision.Php, includes/Logging/LogEntryBase.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-2026-58025 |
| Debian:13 | mediawiki | 1:1.43.9+dfsg-1~deb13u1 | DEBIAN-CVE-2026-58025 |
| Debian:14 | mediawiki | 1:1.43.9+dfsg-1 | DEBIAN-CVE-2026-58025 |
| Ubuntu:25.10 | mediawiki | no fix listed | UBUNTU-CVE-2026-58025 |
| Ubuntu:26.04:LTS | mediawiki | no fix listed | UBUNTU-CVE-2026-58025 |
| Ubuntu:26.10 | mediawiki | no fix listed | UBUNTU-CVE-2026-58025 |
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-502, CWE-94 · Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:L/VI:H/VA:L/SC:L/SI:L/SA:L