CVE-2026-22809: tarteaucitron.js has Regular Expression Denial of Service (ReDoS) vulnerability

Severity: medium (CVSS 4.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-01-13 · updated 2026-06-17
Weakness: CWE-1333

Description

tarteaucitron.js is a compliant and accessible cookie banner. Prior to 1.29.0, a Regular Expression Denial of Service (ReDoS) vulnerability was identified in tarteaucitron.js in the handling of the issuu_id parameter. This vulnerability is fixed in 1.29.0.

Affected products

Amauri Tarteaucitronjs: before 1.29.0 — fixed in 1.29.0

How to fix

Upgrade to a fixed version: Amauri Tarteaucitronjs 1.29.0. Check the vendor advisory for mitigations.

References

https://github.com/AmauriC/tarteaucitron.js/commit/f0bbdac2fdf3cd24a325fc0928c0d34abf1b7b52
https://github.com/AmauriC/tarteaucitron.js/security/advisories/GHSA-q5f6-qxm2-mcqm

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