Growth Experiments ReassignMenteesJob runs as an infinite loop

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-39934
StatePUBLISHED
Assignerwikimedia-foundation
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-07 22:16:24 UTC
Updated2026-04-08 23:16:58 UTC
DescriptionLoop 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 was remediated only on the `master` branch.

Risk And Classification

Primary CVSS: v4.0 6.9 MEDIUM from c4f26cc8-17ff-4c99-b5e2-38fc1793eacc

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.000420000 probability, percentile 0.129610000 (date 2026-04-09)

Problem Types: CWE-835 | CWE-835 CWE-835 Loop with unreachable exit condition ('infinite loop')

VersionSourceTypeScoreSeverityVector
4.0c4f26cc8-17ff-4c99-b5e2-38fc1793eaccSecondary6.9MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:X/C...
4.0CNACVSS6.9MEDIUMCVSS: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 v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Sub Conf.
Low
Sub Integrity
Low
Sub Availability
Low

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA The Wikimedia Foundation Mediawiki - GrowthExperiments Extension affected 1.45 Not specified
CNA The Wikimedia Foundation Mediawiki - GrowthExperiments Extension affected 1.44 Not specified
CNA The Wikimedia Foundation Mediawiki - GrowthExperiments Extension affected 1.43 Not specified
CNA The Wikimedia Foundation Mediawiki - GrowthExperiments Extension affected 1.43 custom Not specified

References

ReferenceSourceLinkTags
gerrit.wikimedia.org/r/c/1243874 c4f26cc8-17ff-4c99-b5e2-38fc1793eacc gerrit.wikimedia.org
phabricator.wikimedia.org/T418222 c4f26cc8-17ff-4c99-b5e2-38fc1793eacc phabricator.wikimedia.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Urbanecm_WMF (en)

CNA: Michael (en)

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