CVE-2026-39934 PUBLISHED

Growth Experiments ReassignMenteesJob runs as an infinite loop

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

Loop with unreachable exit condition ('infinite loop') vulnerability in The Wikimedia Foundation Mediawiki - GrowthExperiments Extension allows Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions.This issue affects Mediawiki - GrowthExperiments Extension: 1.45.2, 1.44.4, 1.43.7.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L
CVSS Score: 6.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	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 - GrowthExperiments Extension
Versions	Default: unaffected Version 1.45.2 is affected Version 1.44.4 is affected Version 1.43.7 is affected

Credits

Urbanecm_WMF finder
Michael finder

References

Problem Types

CWE-835 Loop with unreachable exit condition ('infinite loop') CWE

Impacts

CAPEC-29 Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions