What is CVE-2026-107285?

CVE-2026-107285 is a medium-severity vulnerability in Asynchttpclient Async-Http-Client, classified under Cleartext Transmission of Sensitive Information. CVSS score: 5.9/10. Published 2026-10-07.

How severe is CVE-2026-107285?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Asynchttpclient Async-Http-Client

CVE-2026-107285

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.12 and 2.16.1, a proxied ws request is carried through CONNECT, but NettyRequestFactory.newNettyRequest and requestUri decide whether to attach proxy authentication and an absolute-form target only from whether the URI is secure. Because ws is not marked secure, the tunneled WebSocket upgrade sent to the origin includes the proxy's Proxy-Authorization value. Basic credentials are directly recoverable and Digest responses can be replayed or cracked offline. This issue is fixed in versions 3.0.12 and 2.16.1.

Published 2026-10-07 · last modified 2026-10-08.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Asynchttpclient Async-Http-Client — versions >= 2.0.0, < 2.16.1, >= 3.0.0, <3.0.12

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-107285?: CVE-2026-107285 is a medium-severity vulnerability in Asynchttpclient Async-Http-Client, classified under Cleartext Transmission of Sensitive Information. CVSS score: 5.9/10. Published 2026-10-07.
How severe is CVE-2026-107285?: Medium severity. CVSS v3 base score is 5.9 out of 10.