CVE-2026-107232AsyncHttpClient: Origin credentials sent in cleartext to a proxy that rejects the CONNECT
Updated under an hour ago ()
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It affects AsyncHttpClient async-http-client. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.21%, higher than 11% of scored CVEs.
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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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-319, CWE-441, CWE-522
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.21% (percentile 11)
- Assigned by
- GitHub_M
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
AsyncHttpClient async-http-client asynchttpclient:async_http_client (from the name) | from 3.0.0, < 3.0.12; from 2.0.0, < 2.16.1 | CNA record |
References
- https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-v9f2-7rw2-gr2xx-refsource-confirm
- https://github.com/AsyncHttpClient/async-http-client/commit/3a625cb892233c0a6653ac68823a25ffbc80f393x-refsource-misc
- https://github.com/AsyncHttpClient/async-http-client/commit/a87e7b8c81a6f66a4ce23cd43097fbadd1c788eax-refsource-misc
- https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1x-refsource-misc
- https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.12x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.