CVE-2026-107229 Other in async-http-client
Incomplete cookie domain validation in AsyncHttpClient allows attackers to inject cookies across origins, potentially leading to session fixation and account takeover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-107229?
CVE-2026-107229 is a medium-severity vulnerability in AsyncHttpClient async-http-client, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-107229?
How do I fix CVE-2026-107229?
No fix has been published for CVE-2026-107229 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-107229 being exploited?
There is no known exploitation of CVE-2026-107229 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-107229, GHSA-qjr7-w8pj-pmv9, UBUNTU-CVE-2026-107229.