Vulnerability in Eclipse Foundation Eclipse Jetty

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official description

In Eclipse Jetty, HttpClient may receive a redirect of the form: ``` /secure/../evil ``` If an attacker is able to control the redirects, then HttpClient matches authentication credentials against `/secure` rather than normalizing the path to `/evil`, and will therefore follow the redirect sending the `Authorization` header for `/secure` to `/evil`. This also mean that the attacker must have an evil application deployed on the same domain as the target.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund15 Oct 2026WID-SEC-2026-3992

  Eclipse Jetty: Multiple vulnerabilities Translated from German

  Risk highCVE-2026-18661CVE-2026-76184CVE-2026-19864+4 more CVEs

[ References ]References

• github.com/jetty/jetty.project/security/advisories/GHSA-qfr2-43g5-g768
• gitlab.eclipse.org/security/cve-assignment/-/work_items/236