Bug 2548134 (CVE-2026-107229)

Summary:	CVE-2026-107229 org.asynchttpclient/async-http-client: async-http-client: Cross-domain cookie injection via incomplete cookie domain validation
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	gmalinko, janstey, pdelbell, rstepani
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in AsyncHttpClient. The library's cookie store incompletely validates domain attributes when processing HTTP cookies. A remote attacker controlling a server can exploit this vulnerability to store cookies that the client subsequently sends to unrelated domains. This allows cross-domain cookie injection, potentially exposing applications that share an HTTP client instance to session fixation attacks.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-10-08 18:01:40 UTC

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.