CVE-2026-77711

When Jetty's `HttpClient` make a request to a server through a forward proxy, the server may reply with a 407 (Proxy Authentication Required). The client mistakenly interprets the 407 as coming from the proxy, so it re-sends the request with the `Proxy-Authentication` header, which arrives to the server, that now has access to the proxy credentials.

CVSS

No CVSS.

References

Link	Resource
https://github.com/jetty/jetty.project/security/advisories/GHSA-r2c5-3p8g-wpvw
https://gitlab.eclipse.org/security/cve-assignment/-/work_items/238
https://github.com/jetty/jetty.project/security/advisories/GHSA-r2c5-3p8g-wpvw

Configurations

No configuration.

History

15 Oct 2026, 14:17

Type	Values Removed	Values Added
References	~~() https://github.com/jetty/jetty.project/security/advisories/GHSA-r2c5-3p8g-wpvw -~~	() https://github.com/jetty/jetty.project/security/advisories/GHSA-r2c5-3p8g-wpvw -

15 Oct 2026, 09:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-15 09:17

Updated : 2026-10-15 14:41

NVD link : CVE-2026-77711

Mitre link : CVE-2026-77711

CVE.ORG link : CVE-2026-77711

JSON object : View

Products Affected

No product.

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

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