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 fixed in 1.29.0.

Vulnerability class: ReDoS (Regular Expression Denial of Service)

Published 2026-01-13 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.001 (1.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Amauri Tarteaucitronjs
Amauric Tarteaucitron.js — versions < 1.29.0

Weakness classification (CWE)

CWE-1333 — Inefficient Regular Expression Complexity

References

github.com/AmauriC/tarteaucitron.js/security/advisories/GHSA-q5f6-qxm2-mcqm (Patch, Vendor Advisory)
github.com/AmauriC/tarteaucitron.js/commit/f0bbdac2fdf3cd24a325fc0928c0d34abf1b… (Patch)

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.