CVE catalog

CVE-2026-58026

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Parser/Parser.Php. This is

[CVE catalog]

Severity: Low · CVSS 0CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: Jun 29, 2026, 10:00:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.37% · Oct 25, 2026

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Parser/Parser.Php. This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	mediawiki	sid	`1:1.43.11+dfsg-3`	fixed
Debian	mediawiki	forky	`1:1.43.11+dfsg-1`	fixed
Debian	mediawiki	trixie	`1:1.43.9+dfsg-1~deb13u1`	fixed
Debian	mediawiki	trixie-security	`1:1.43.9+dfsg-1~deb13u1`	fixed
Debian	mediawiki	bookworm	`1:1.39.17-1+deb12u2`	vulnerable
Debian	mediawiki	bookworm-security	`1:1.39.17-1+deb12u2`	vulnerable
Cpe	mediawiki	Not reported	Not reported	vulnerable
Cpe	mediawiki	Not reported	`1.43.9`	fixed
Cpe	mediawiki	Not reported	`1.44.6`	fixed
Cpe	mediawiki	Not reported	`1.45.4`	fixed
Cpe	mediawiki	Not reported	Not reported	unknown
Cpe	mediawiki	Not reported	Not reported	unknown

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	mediawiki	source	sid	`1:1.43.9+dfsg-1`	not yet assigned	Not reported	Not reported
Debian	mediawiki	source	forky	`1:1.43.9+dfsg-1`	not yet assigned	Not reported	Not reported
Debian	mediawiki	source	trixie	`1:1.43.9+dfsg-1~deb13u1`	not yet assigned	Not reported	Not reported
Debian	mediawiki	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Cpe	mediawiki	cpe	Not reported	`1.43.9`	Not reported	Not reported	Not reported
Cpe	mediawiki	cpe	Not reported	`1.44.6`	Not reported	Not reported	Not reported
Cpe	mediawiki	cpe	Not reported	`1.45.4`	Not reported	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[mediawiki]Affected
Details (4)
- 1:1.39.17-1+deb12u2 · all · bookworm
  Affected
  nvd · mediawiki · debian · bookworm; nvd · mediawiki · debian · 12
- 1:1.39.17-1+deb12u2 · all · bookworm
  Affected
  nvd · mediawiki · debian · bookworm; nvd · mediawiki · debian · 12
- 1:1.39.17-1+deb12u2 · all · bookworm-security
  Affected
  nvd · mediawiki · debian · bookworm; nvd · mediawiki · debian · 12
- 1:1.39.17-1+deb12u2 · all · bookworm-security
  Affected
  nvd · mediawiki · debian · bookworm; nvd · mediawiki · debian · 12
[mediawiki-classes]Affected
Source package: [mediawiki]
Details (4)
- 1:1.39.17-1+deb12u2 · all · bookworm
  Affected
  nvd · mediawiki · debian · bookworm; nvd · mediawiki · debian · 12
- 1:1.39.17-1+deb12u2 · all · bookworm
  Affected
  nvd · mediawiki · debian · bookworm; nvd · mediawiki · debian · 12
- 1:1.39.17-1+deb12u2 · all · bookworm-security
  Affected
  nvd · mediawiki · debian · bookworm; nvd · mediawiki · debian · 12
- 1:1.39.17-1+deb12u2 · all · bookworm-security
  Affected
  nvd · mediawiki · debian · bookworm; nvd · mediawiki · debian · 12

[Debian 13 (Trixie)]

[mediawiki]Fixed
Details (4)
- 1:1.43.9+dfsg-1~deb13u1 · all · trixie
  Fixed · Fixed: 1:1.43.9+dfsg-1~deb13u1
  nvd · mediawiki · debian · 13
- 1:1.43.9+dfsg-1~deb13u1 · all · trixie
  Fixed · Fixed: 1:1.43.9+dfsg-1~deb13u1
  nvd · mediawiki · debian · 13
- 1:1.43.9+dfsg-1~deb13u1 · all · trixie-security
  Fixed · Fixed: 1:1.43.9+dfsg-1~deb13u1
  nvd · mediawiki · debian · 13
- 1:1.43.9+dfsg-1~deb13u1 · all · trixie-security
  Fixed · Fixed: 1:1.43.9+dfsg-1~deb13u1
  nvd · mediawiki · debian · 13
[mediawiki-classes]Fixed
Source package: [mediawiki]
Details (4)
- 1:1.43.9+dfsg-1~deb13u1 · all · trixie
  Fixed · Fixed: 1:1.43.9+dfsg-1~deb13u1
  nvd · mediawiki · debian · 13
- 1:1.43.9+dfsg-1~deb13u1 · all · trixie
  Fixed · Fixed: 1:1.43.9+dfsg-1~deb13u1
  nvd · mediawiki · debian · 13
- 1:1.43.9+dfsg-1~deb13u1 · all · trixie-security
  Fixed · Fixed: 1:1.43.9+dfsg-1~deb13u1
  nvd · mediawiki · debian · 13
- 1:1.43.9+dfsg-1~deb13u1 · all · trixie-security
  Fixed · Fixed: 1:1.43.9+dfsg-1~deb13u1
  nvd · mediawiki · debian · 13

Observed: Oct 27, 2026, 7:13:50 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]