Regular Expression Denial of Service Vulnerability in Tarteaucitron.js Cookie Banner
CVE-2026-22809

4.4MEDIUM

Key Information:

Vendor

Amauric

Status
Tarteaucitron.js
Vendor
CVE Published:
13 January 2026

What is CVE-2026-22809?

A vulnerability related to Regular Expression Denial of Service (ReDoS) has been identified in tarteaucitron.js prior to version 1.29.0. This flaw arises from the improper handling of the 'issuu_id' parameter, which could potentially allow attackers to exploit regular expressions in a way that results in service disruption. Users are encouraged to update to version 1.29.0 or later to mitigate the risk associated with this vulnerability. For more details, refer to the security advisory and commit documenting the fix.

Affected Version(s)

tarteaucitron.js < 1.29.0

References

https://github.com/AmauriC/tarteaucitron.js/security/advi...
x_refsource_CONFIRM
https://github.com/AmauriC/tarteaucitron.js/commit/f0bbda...
x_refsource_MISC

CVSS V3.1

Score:
4.4
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.