Medium severity · published Apr 7, 2026
CVE-2026-39934
Growth Experiments ReassignMenteesJob runs as an infinite loop
6.9
CVSS
0.3%
EPSS
No
On KEV
Description
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 was remediated only on the `master` branch.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MG
Mediawiki - GrowthExperiments Extension · The Wikimedia Foundation
1.45; 1.44; 1.43; before 1.43 · source: vendor
Affected product
MG
Mediawiki - GrowthExperiments Extension
The Wikimedia Foundation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-39934
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-39934
gerrit.wikimedia.org
https://gerrit.wikimedia.org/r/c/1243874
phabricator.wikimedia.org
https://phabricator.wikimedia.org/T418222
More from Mediawiki - GrowthExperiments Extension
5.4
CVE-2026-22713
Stored XSS through edit summaries in GrowthExperiments