# Jetty HttpClient accepts proxy authentication challenges from an HTTPS origin and discloses proxy credentials inside the tunnel

Advisory record · `GHSA-r2c5-3p8g-wpvw`

- **Identifiers:** `GHSA-r2c5-3p8g-wpvw` · `CVE-2026-77711`
- **State:** Confirmed
- **Severity:** CVSS 8.2 High
- **Critical:** No
- **Weakness (CWE):** [CWE-200](https://cwe.mitre.org/data/definitions/200.html)
- **Tags:** [Information disclosure](https://agentprime.io/advisories/tag/info-disclosure.md)
- **Published:** 15 Oct 2026
- **Updated:** 15 Oct 2026
- **Reviewed by a person:** No

[Published by the maintainers](https://github.com/jetty/jetty.project/security/advisories/GHSA-r2c5-3p8g-wpvw) · not yet reviewed by GitHub. The jetty/jetty.project maintainers published this as a GitHub repository advisory; GitHub’s reviewed advisory replaces it here when it arrives.

Published by the jetty/jetty.project maintainers at 15 Oct 2026, 10:52 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `org.eclipse.jetty:jetty-client` (Maven): affected `>=12.1.0, <=12.1.12 || >=12.0.0, <=12.0.38 || >=11.0.0, <=11.0.32 || >=10.0.0, <=10.0.32 || >=9.4.0, <=9.4.64`; no fixed version yet

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 8.2 High, CVSS 4.0: `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`, from CNA (eclipse)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0044, the 38th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 15 Oct 2026, 10:52 UTC: [Published by the maintainers as a GitHub repository advisory](https://github.com/jetty/jetty.project/security/advisories/GHSA-r2c5-3p8g-wpvw)

## Sources

- [GitHub Advisory Database: GHSA-r2c5-3p8g-wpvw](https://github.com/advisories/GHSA-r2c5-3p8g-wpvw)
- [OSV: GHSA-r2c5-3p8g-wpvw](https://osv.dev/vulnerability/GHSA-r2c5-3p8g-wpvw)
- <https://github.com/jetty/jetty.project/security/advisories/GHSA-r2c5-3p8g-wpvw>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-r2c5-3p8g-wpvw>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-r2c5-3p8g-wpvw/>. Everything for agents: <https://agentprime.io/llms.txt>.