Quick answers
- Is CVE-2026-84663 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-84663 being exploited in the wild.
- How severe is CVE-2026-84663?
- Medium severity, with a CVSS score of 5.4, published 2 September 2026.
- Which products and versions are affected?
- Jenkins Pipeline: Groovy Libraries Plugin 798.v5cc688825312 and earlier.
- Is there a fix for CVE-2026-84663?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-84663 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-84663?
- Check whether you run Jenkins Pipeline: Groovy Libraries Plugin at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
This is a cross-site request forgery (CSRF) vulnerability in Jenkins Pipeline: Groovy Libraries Plugin versions 798.v5cc688825312 and earlier. The vulnerable component lacks CSRF token validation on cache deletion operations, allowing attackers to craft malicious web pages that, when visited by an authenticated administrator, trigger cache deletion requests without the user's knowledge or consent. The attack requires network access to Jenkins and an authenticated user with cache management permissions to visit an attacker-controlled page. No authentication is required from the attacker themselves. The impact is limited to denial of service through cache deletion; arbitrary code execution is not possible. A fix is available in plugin versions after 798.v5cc688825312.
Affected products
- Jenkins Pipeline: Groovy Libraries Plugin 798.v5cc688825312 and earlier
Timeline
- 2026-09-02: disclosed