CVE-2026-39937 PUBLISHED

Global vanishing does not completely remove user email

Assigner: wikimedia-foundation
Reserved: 07.04.2026 Published: 07.04.2026 Updated: 08.04.2026

Improper removal of sensitive information before storage or transfer vulnerability in The Wikimedia Foundation Mediawiki - CentralAuth Extension allows Resource Leak Exposure.This issue affects non release branches.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:L/SI:L/SA:L
CVSS Score: 8.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	Low
Attack Complexity	Low	Integrity	Low	Integrity	Low
Attack Requirements	None	Availability	Low	Availability	Low
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	The Wikimedia Foundation
Product	Mediawiki - CentralAuth Extension
Versions	Default: unaffected Version 1.43.7 is unaffected Version 1.44.4 is unaffected Version 1.45.2 is unaffected

Credits

Urbanecm finder
kostajh remediation developer

References

Problem Types

CWE-212 Improper removal of sensitive information before storage or transfer CWE

Impacts

CAPEC-131 Resource Leak Exposure