Disclosure summary
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.13 and 2.16.1, ThreadSafeCookieStore validates Domain attributes with domain matching but does not reject public suffixes. A host beneath a suffix such as co.uk can set a cookie for that suffix, after which the shared cookie store sends it to unrelated hosts under the suffix. This can inject or overwrite session-relevant cookie values across origins. This issue is fixed in versions 3.0.13 and 2.16.1.
Source-reported weakness categories
CWE-1275
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2026-107280
Open original source · Updated Oct 08, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
GitHub Reviewed Security Advisories · GHSA-f9m8-cv68-674w
Open original source · Updated Oct 08, 2026
AsyncHttpClient: Cookie Domain attribute is not checked against the public suffix list, so a cookie can be set for co.uk
Source severity: MEDIUM / 6.9
| Ecosystem | Package | Affected range | First patched |
|---|---|---|---|
| maven | org.asynchttpclient:async-http-client | >= 3.0.0, | 3.0.13 |
| maven | org.asynchttpclient:async-http-client | >= 2.0.0, | 2.16.1 |
Original records & references
PUBLISHED 2026-10-07T18:17:03-04:00
MODIFIED 2026-10-08T16:35:31-04:00
INGESTED 2026-10-10T20:55:02-04:00