Home/CVE/Improper removal of sensitive information before storage or transfer vulnerability in The Wikimedia Foundation Mediawiki
CVE

CVE-2026-39937

Improper removal of sensitive information before storage or transfer vulnerability in The Wikimedia Foundation Mediawiki

Improper removal of sensitive information before storage or transfer vulnerability in The Wikimedia Foundation Mediawiki - CentralAuth Extension allows Resource Leak Exposure. The issue has been remediated on the master branch, and in the release branches for MediaWiki versions 1.43, 1.44, and 1.45.

EPSS 0.0006
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-212Improper Removal of Sensitive Information Before Storage or Transfer
▣

Scoring & Timeline

Published to NVD07 Apr 2026 · 10:16 PM
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://gerrit.wikimedia.org/r/q/I0b72427fa329aee85841a2cb23dec3058edce85e
https://phabricator.wikimedia.org/T418122
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