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🛡️ CVE-2026-22809 — tarteaucitronjs

🟡 CVSS 4.4 — Medium ✅ No Known Exploit CWE-1333 OSV
4.4
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

tarteaucitron.js has Regular Expression Denial of Service (ReDoS) vulnerability

Summary

A potential Regular Expression Denial of Service (ReDoS) vulnerability was identified in tarteaucitron.js in the handling of the issuu_id parameter.

Details

The issue was caused by the use of insufficiently constrained regular expressions applied to attacker-controlled input:

if (issuu_id.match(/\d+\/\d+/)) {

issuu_embed = '#' + issuu_id;

} else if (issuu_id.match(/d=(.*)&u=(.*)/)) {

issuu_embed = '?' + issuu_id;

}

These expressions are not anchored and rely on greedy patterns (.*). When evaluated against specially crafted input, they may cause excessive backtracking, leading to high CPU consumption and potential denial of service.

Impact

An attacker able to control the issuu_id parameter could exploit this vulnerability to degrade performance or cause temporary service unavailability through CPU exhaustion.

No confidentiality or integrity impact was identified.

Fix https://github.com/AmauriC/tarteaucitron.js/commit/f0bbdac2fdf3cd24a325fc0928c0d34abf1b7b52

The logic was simplified and hardened by removing ambiguous regular expressions and enforcing strict input validation:

if (issuu_id.match(/^\d+\/\d+$/)) {

issuu_embed = '#' + issuu_id;

} else {

issuu_embed = '?' + issuu_id;

}

This change eliminates the risk of catastrophic backtracking and prevents ReDoS conditions.

Additionally, code related to the legacy "Alexa Rank" service was removed. This service, historically provided by Alexa.com via browser toolbars and popularity rankings, has been deprecated for several years and is no longer operational. The Alexa domain is now exclusively associated with the Amazon voice assistant, and the original ranking service has been permanently discontinued.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs administrative privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: High — administrative rights are needed first.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: None.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2026-22809 is classified as CWE-1333: Inefficient Regular Expression Complexity. A regular expression backtracks catastrophically on crafted input, consuming CPU out of proportion to input size.

Affected software

CVE-2026-22809 is recorded against 1 package.

  • tarteaucitronjs

Timeline and source

Published on 13 January 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from OSV.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Package)

Other advisories for this package

tarteaucitronjs has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-1333: Inefficient Regular Expression Complexity) in other software:

Details

Severity MEDIUM
CVSS Score 4.4
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE CWE-1333
Public Exploit ✅ No
Source OSV
Published 2026-01-13
Updated 2026-08-20
Modified 2026-06-17

Affected Packages

Software From version Fixed in
tarteaucitronjs — —

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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