The vulnerability identified as CVE-2026-22809 affects Amauri's Tarteaucitron.js, a cookie banner known for its compliance and accessibility features. Specifically, prior to version 1.29.0, the library contains a Regular Expression Denial of Service (ReDoS) vulnerability associated with the handling of the issuu_id parameter. This vulnerability has been addressed and fixed in version 1.29.0, which was released on January 13, 2026.
The severity of this vulnerability is classified as medium, with a CVSS score of 4.4. This level of severity indicates that while the vulnerability does not guarantee immediate exploitation, it poses a significant risk to organizations, particularly those utilizing the affected version of Tarteaucitron.js.
Risk to organizations includes potential service disruptions due to the vulnerability's nature, which can lead to denial of service if exploited. Given the increasing reliance on cookie consent management solutions, failure to address this vulnerability can result in significant operational impacts.
Organizations should prioritize patching immediately. The fix is readily available in the latest release, and immediate updates will help mitigate the risks associated with potential exploitation.
Vulnerability Details
The CVE-2026-22809 vulnerability is a ReDoS vulnerability found in Tarteaucitron.js before version 1.29.0. The affected software is used for cookie consent management, and this vulnerability is classified under the CWE-1333 category. The attack vector is classified as local, requiring high privileges, while user interaction is not necessary. The availability impact is rated as high, meaning that successful exploitation can significantly disrupt service.
Technical Analysis
The root cause of this vulnerability stems from inefficient handling of the issuu_id parameter in regular expressions, making it susceptible to ReDoS attacks. The attack complexity is rated low, and the required privileges for exploitation are high, indicating that an attacker would need elevated access to initiate an exploit. As user interaction is not required, a successful attack could be executed without the victim's knowledge.
In terms of impacts, the vulnerability does not affect the confidentiality or integrity of the application, but it poses a high risk to availability. This means that while sensitive data remains protected, the application could become unresponsive under certain attack conditions.
Risk & Impact Analysis
Real-world deployment of Tarteaucitron.js with this vulnerability presents operational risks for organizations that rely on cookie consent management. If exploited, the ReDoS could lead to service interruptions, affecting user experience and potentially resulting in compliance issues with data protection regulations.
The blast radius for this vulnerability could be significant if multiple services utilize the affected library. Organizations must assess their deployment strategies and ensure that they are running the patched version to avoid disruptions.
Given the CVSS score of 4.4 and the absence of known exploitation in the wild, organizations should address this vulnerability in their priority patch cycle.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected version of Tarteaucitron.js is any version prior to 1.29.0. Users are strongly advised to upgrade to this version or later to mitigate the vulnerability.
Mitigation & Remediation
To remediate this vulnerability, organizations should upgrade Tarteaucitron.js to version 1.29.0 or later. If immediate patching is not feasible, organizations should consider implementing workarounds such as disabling the issuu_id parameter handling where possible until the upgrade is complete.
For more comprehensive security practices, organizations can engage in penetration testing to identify similar vulnerabilities in their systems.
Detection Guidance
Organizations should monitor logs for any unusual activity related to the usage of Tarteaucitron.js, specifically regarding the issuu_id parameter. Behavioral anomalies that deviate from normal operation patterns should be investigated promptly.
AppSecure Threat Intelligence Insight
The CVE-2026-22809 vulnerability highlights the importance of ongoing security assessments within the software supply chain. Regularly updating libraries and frameworks is crucial for maintaining security posture.
Security teams should consider adopting a vulnerability management program to continually assess and mitigate risks associated with third-party components.
Additionally, trends in vulnerabilities like CVE-2026-22809 suggest a growing need for robust penetration testing methodologies to identify potential weaknesses before they can be exploited.
In conclusion, staying informed about vulnerabilities like CVE-2026-22809 plays a critical role in an organization's overall security strategy.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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