Bug 2496140 (CVE-2026-55688) - CVE-2026-55688 async-http-client: AsyncHttpClient: Cookie injection allows planting cookies for unrelated domains
Summary: CVE-2026-55688 async-http-client: AsyncHttpClient: Cookie injection allows pl...
Keywords:
Status: NEW
Alias: CVE-2026-55688
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-01 20:01 UTC by OSIDB Bzimport
Modified: 2026-07-08 08:17 UTC (History)
19 users (show)

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Description OSIDB Bzimport 2026-07-01 20:01:40 UTC
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. In versions from 2.0.0 prior to 2.16.0 and from 3.0.0.Beta1 prior to 3.0.11, ThreadSafeCookieStore stored a cookie under the value of its Domain attribute without verifying that the responding host is allowed to set a cookie for that domain, leading to a cookie tossing / cookie injection issue. A host the client connects to can therefore plant a cookie scoped to an unrelated domain, and the client will then send that cookie on later requests to that domain. Applications that use a single AsyncHttpClient instance - and thus the default, shared CookieStore - to reach both an attacker-influenced host and a trusted host are impacted. This issue has been fixed in versions 2.16.0 and 3.0.11.


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