UBUNTU-CVE-2026-77711

See a problem?
Please try reporting it to the source first.

Source

https://ubuntu.com/security/CVE-2026-77711

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-77711.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-77711

Upstream

CVE-2026-77711

Published

2026-10-15T00:00:00Z

Modified

2026-10-17T13:01:08Z

Severity

8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

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.

References

Affected packages

Ubuntu:14.04:LTS / jetty

Package

Name: jetty
Purl: pkg:deb/ubuntu/jetty?arch=source&distro=trusty

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

6.*

6.1.26-1ubuntu1

6.1.26-1ubuntu1.1

6.1.26-1ubuntu1.2

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "jetty",
            "binary_version":  "6.1.26-1ubuntu1.2"
        },
        {
            "binary_name":  "libjetty-extra",
            "binary_version":  "6.1.26-1ubuntu1.2"
        },
        {
            "binary_name":  "libjetty-extra-java",
            "binary_version":  "6.1.26-1ubuntu1.2"
        },
        {
            "binary_name":  "libjetty-java",
            "binary_version":  "6.1.26-1ubuntu1.2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-77711.json"

Ubuntu:16.04:LTS / jetty