CVE-2026-34094Network attack vector

User misdirection via relative protection help link

Published May 11, 2026 · Updated May 11, 2026

Navigation flaw in MediaWiki before 1.43.7, 1.44.4, and 1.45.2 allows remote authenticated users to misdirect help-link clicks. Article.php builds the customized help target for the page-protection indicator without the required /wiki/ prefix, so browsers resolve it relative to the protected subpage. Exploitation requires high-privileged control of the customized link and a user click; the resulting navigation reaches only a wrong wiki-relative destination.

CVSS severity2.0
Low
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Navigation flaw in MediaWiki before 1.43.7, 1.44.4, and 1.45.2 allows remote authenticated users to misdirect help-link clicks. Article.php builds the customized help target for the page-protection indicator without the required /wiki/ prefix, so browsers resolve it relative to the protected subpage. Exploitation requires high-privileged control of the customized link and a user click; the resulting navigation reaches only a wrong wiki-relative destination.

The record

CVE
CVE-2026-34094
Published
May 11, 2026
Updated
May 11, 2026
Vendor
Wikimedia Foundation
Product
MediaWiki
Classifications
CWE-668
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 11, 2026CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=* <1.43.7, 1.44.4, 1.45.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Wikimedia Foundation · MediaWikiversion=* <1.43.7, 1.44.4, 1.45.2

Published CVSS scores

2.0Wikimedia FoundationCVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
3.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-668Exposure of Resource to Wrong Sphere

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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