Quick answers
- Is CVE-2026-117620 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-117620 being exploited in the wild.
- How severe is CVE-2026-117620?
- Informational severity, published 28 October 2026.
- Which products and versions are affected?
- Jenkins 2.587 and earlier, LTS 2.580.1 and earlier.
- Is there a fix for CVE-2026-117620?
- 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-2026-117620 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-117620?
- Check whether you run Jenkins 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
The "Manage Old Data" feature in Jenkins 2.587 and earlier, LTS 2.580.1 and earlier fails to properly validate or sanitize attacker-controlled warnings, allowing users with Overall/Read permission to inject malicious data. When an administrator processes these warnings, the injected data can override existing user account information including login passwords. No fix is documented in the provided advisory text.
Affected products
- Jenkins Jenkins 2.587 and earlier, LTS 2.580.1 and earlier