CVE-2026-10050: Eclipse Jetty

Critical severity, CVSS 9.1. EPSS: 0.6% chance of exploitation in the next 30 days.

In Eclipse Jetty, the Digest authentication server-side component uses ISO-8859-1 to encode the password as bytes. This was done because the initial specification for HTTP did not specify explicitly a charset, and it was assumed to be ISO-8859-1 for historical reasons. If the password contains characters that cannot be represented in ISO-8859-1, they are silently replaced by `?`. This happens with passwords that contain Chinese, Cyrillic or Greek characters, for example: `αβ123` converts to `??123`. An attacker can send a request with a digest `Authorization` header crafted with a password made of only `?` characters; the server would match any password of the same length that contains non-ISO-8859-1 characters. Recent HTTP Digest [RFC-7616](https://datatracker.ietf.org/doc/html/rfc7616) supports a `charset` parameters that defaults to UTF-8 that allows for correct encoding/decoding of passwords.

Affected products

• Eclipse Jetty: from 9.4.0, before 9.4.63 (fixed in 9.4.63); from 10.0.0, before 10.0.31 (fixed in 10.0.31); from 11.0.0, before 11.0.31 (fixed in 11.0.31); from 12.0.0, before 12.0.36 (fixed in 12.0.36); from 12.1.0, before 12.1.10 (fixed in 12.1.10)

Published 2026-08-04. Last modified 2026-08-08.