What is CVE-2026-22809?

CVE-2026-22809 is a medium-severity vulnerability in Amauri Tarteaucitronjs, classified under Inefficient Regular Expression Complexity. CVSS score: 4.4/10. Published 2026-01-13.

How severe is CVE-2026-22809?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in Amauri Tarteaucitronjs

CVE-2026-22809

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…

Vulnerability class: ReDoS (Regular Expression Denial of Service)

EPSS: 0.001 (1.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

Affected products

Amauri Tarteaucitronjs
Amauric Tarteaucitron.js — versions < 1.29.0

Weakness classification (CWE)

CWE-1333 — Inefficient Regular Expression Complexity

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-22809?: CVE-2026-22809 is a medium-severity vulnerability in Amauri Tarteaucitronjs, classified under Inefficient Regular Expression Complexity. CVSS score: 4.4/10. Published 2026-01-13.
How severe is CVE-2026-22809?: Medium severity. CVSS v3 base score is 4.4 out of 10.