CVE-2026-85718

NameCVE-2026-85718
DescriptionThe AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 3.0.8 until 3.0.12, a client with maxConnections or maxConnectionsPerHost set above zero leaks one connection permit whenever TLS connection establishment fails before the handshake completes. NettyConnectListener removes the partitionKeyLock permit from NettyResponseFuture before every failure path is bound to the channel closeFuture, so an abort can leave the permit unreleased. Repeated failures can permanently lock out one host under a per-host limit or drain the shared pool under a global limit, blocking later requests even when no connection remains open. The default unlimited connection setting is not affected. This issue is fixed in version 3.0.12.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
async-http-client (PTS)bookworm, sid2.12.3-1fixed
bookworm (security)2.12.3-1+deb12u1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
async-http-clientsource(unstable)(not affected)

Notes

- async-http-client <not-affected> (Vulnerable code not present)
https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-gcmv-gr82-6m8v
https://github.com/AsyncHttpClient/async-http-client/issues/2189
https://github.com/AsyncHttpClient/async-http-client/pull/2288
Fixed by: https://github.com/AsyncHttpClient/async-http-client/commit/64eb57af52a003ae7f29a2f9f4502271bbb138dd (async-http-client-project-3.0.12)

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