CVE-2026-34094: Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files include

Routine

LOW 3.8UPGRADE

CVE-2026-34094 is a low-severity flaw (CVSS 3.8) affecting mediawiki. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Page/Article.Php. This issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.8 (Low)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.2% (top 94%)
CISA exploited list	No
Weakness	CWE-668
Published	2026-05-11
Last modified	2026-10-26

Publisher (CNA): wikimedia-foundation · Vendor: mediawiki

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-11 18:16 UTCPublished CVE record published
2026-10-26 18:10 UTCUpdated Record last modified

mediawiki mediawiki UPGRADE

Affected: < 1.43.7 · >= 1.44.0 and < 1.44.4 · >= 1.45.0 and < 1.45.2

Fixed in: 1.43.7, 1.44.4, 1.45.2

Safe to downgrade to: a release before 1.44.0

1. Check installed version

apt-cache policy mediawiki || rpm -q mediawiki || mediawiki --version

2. UPGRADE to 1.43.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mediawiki

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mediawiki

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.44.0 (Debian / Ubuntu)

apt-cache madison mediawiki sudo apt install mediawiki=<VERSION_BEFORE_1.44.0> sudo apt-mark hold mediawiki

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list mediawiki sudo dnf downgrade mediawiki-<VERSION_BEFORE_1.44.0> sudo dnf versionlock add mediawiki

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-34094?

mediawiki: upgrade to 1.43.7, 1.44.4, 1.45.2. Exact commands for each OS are on this page.

Is CVE-2026-34094 being exploited?

CVE-2026-34094 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-34094 affect?

CVE-2026-34094 affects mediawiki. Severity is low (CVSS 3.8). Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Page/Article.Php. This issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2.

How urgent is CVE-2026-34094?

Priority 15/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-34088 HIGH 7.5 UPGRADE Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. T
CVE-2026-34091 HIGH 7.5 UPGRADE Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. T
CVE-2026-34087 HIGH 7.5 UPGRADE Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation OATHAuth. Th
CVE-2026-34093 MEDIUM 5.3 UPGRADE Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki.
CVE-2026-34095 MEDIUM 6.1 UPGRADE Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files include

References

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