CVE-2026-107229: medium-severity vulnerability in AsyncHttpClient async-http-client
AsyncHttpClient: Incomplete origin checks in the default cookie store allow cookie tossing onto public-suffix and IP-address hosts
Published
10Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4
exploitation probability
—
observed exploitation
nono source reports it
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.16.0 until 3.0.14, ThreadSafeCookieStore incompletely validates cookie Domain attributes. Missing private-section and default public-suffix rules, absent A-label normalization, locale-sensitive lowercasing, public-suffix host-only handling, and numeric or IP host checks allow one origin to store a cookie later sent to another origin. Applications sharing one client across trust domains can therefore receive attacker-injected cookies and may be exposed to session fixation. This issue is fixed in version 3.0.14.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
Affected products
AsyncHttpClient · async-http-clientRelated CVEs — AsyncHttpClient async-http-client
In the same product, most dangerous first.
CVE-2024-53990CRITICALAsyncHttpClient (AHC) library's `CookieStore` replaces explicitly defined `Cookie`sEPSS 0.6%CVE-2026-85721HIGHAsyncHttpClient: Unbounded HTTP/1.1 response decompression enables a decompression-bomb denial of serviceEPSS 0.6%CVE-2026-85718MEDIUMAsyncHttpClient: Connection permit leak on TLS handshake failure causes per-host denial of serviceEPSS 0.5%CVE-2026-85717MEDIUMAsyncHttpClient: Client-wide realm credentials re-sent to a cross-origin redirect targetEPSS 0.5%CVE-2026-40490MEDIUMAsyncHttpClient leaks authorization credentials to untrusted domains on cross-origin redirectsEPSS 0.5%CVE-2026-45300HIGHasync-http-client: Cookie header not stripped on cross-origin redirectEPSS 0.5%
References
https://github.com/AsyncHttpClient/async-http-client/commit/7dc5bbc2d0a48aa2a9caf089a626dcfd333168e9https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.14https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-qjr7-w8pj-pmv9