CVE-2026-100377: Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Mediawiki - WikiLambda Extension allows Exc

Executive brief

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Mediawiki - WikiLambda Extension allows Excavation.

This issue affects Mediawiki - WikiLambda Extension: 1.47.0-alpha. The issue has been remediated on the `master` branch.

References

• https://gerrit.wikimedia.org/r/c/mediawiki/extensions/WikiLambda/+/1320186
• https://phabricator.wikimedia.org/T430601