CVE-2026-111714

tarteaucitron.js before 1.37.0 contains a regular expression denial of service vulnerability that allows attackers to block visitor pages by supplying unescaped cookie names to cookie.purge. Attackers can plant a cookie from a sibling subdomain or inject a purgeBtn element with a catastrophic-backtracking data-cookie pattern that freezes the page when the purge button is clicked.

CVSS 4.0

2.3CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

CVSS 3.1

3.1CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L

EPSS

0.2% chance of exploitation in the next 30 days; higher than 12% of CVEs (scores of 2026-10-25)

CWE

CWE-1333

Published

2026-10-16

Modified

2026-10-21

Record from

the NVD, synced 2026-10-22

References

• https://github.com/AmauriC/tarteaucitron.js/blob/v1.36.0/tarteaucitron.js#L2169-L2175
• https://github.com/AmauriC/tarteaucitron.js/commit/60faaba5fd541cad770549d422fc4ac7de657e56
• https://github.com/AmauriC/tarteaucitron.js/releases/tag/v1.37.0
• https://www.vulncheck.com/advisories/tarteaucitron-js-before-1.37.0-redos-via-unescaped-cookie-name-in-cookie-purge

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