# AsyncHttpClient: Digest challenge without a usable nonce downgrades to Basic and sends the password in cleartext

Advisory record · `GHSA-rqf5-2wxv-rjf4`

- **Identifiers:** `GHSA-rqf5-2wxv-rjf4` · `CVE-2026-107231`
- **State:** Confirmed
- **Severity:** CVSS 8.7 High
- **Critical:** No
- **Weakness (CWE):** [CWE-319](https://cwe.mitre.org/data/definitions/319.html) · [CWE-522](https://cwe.mitre.org/data/definitions/522.html) · [CWE-757](https://cwe.mitre.org/data/definitions/757.html)
- **Tags:** [Weak cryptography or TLS](https://agentprime.io/advisories/tag/weak-crypto.md) · [Hard-coded credentials](https://agentprime.io/advisories/tag/hard-coded-credentials.md) · [CWE-757](https://agentprime.io/advisories/tag/cwe-757.md)
- **Published:** 8 Oct 2026
- **Updated:** 8 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 8 Oct 2026, 16:23 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `org.asynchttpclient:async-http-client` (Maven): affected `>=3.0.0.Beta1, <3.0.13 || >=2.0.0, <2.16.1`; fixed in `3.0.13`, `2.16.1`

## 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

- 8.7 High, CVSS 4.0: `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`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0024, the 14th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:16 UTC: First seen by agentprime
- 31 Oct 2026, 14:16 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-rqf5-2wxv-rjf4)

## Sources

- [GitHub Advisory Database: GHSA-rqf5-2wxv-rjf4](https://github.com/advisories/GHSA-rqf5-2wxv-rjf4)
- [OSV: GHSA-rqf5-2wxv-rjf4](https://osv.dev/vulnerability/GHSA-rqf5-2wxv-rjf4)
- <https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-rqf5-2wxv-rjf4>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-107231>
- <https://github.com/AsyncHttpClient/async-http-client/commit/8376866aa9b5a7653ad19db9d472692f875caa83>
- <https://github.com/AsyncHttpClient/async-http-client/commit/c8d639bf6ac341d377d610a93570bcd15565f1a6>
- <https://github.com/AsyncHttpClient/async-http-client>
- <https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1>
- <https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.13>

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-rqf5-2wxv-rjf4>, 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-rqf5-2wxv-rjf4/>. Everything for agents: <https://agentprime.io/llms.txt>.