CVE-2026-107280: CWE-1275: Sensitive Cookie with Improper SameSite Attribute in AsyncHttpClient async-http-client
Description
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.
CVSS v4.0
Score 6.9medium
Affected software
AsyncHttpClient
async-http-client
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-07T15:53:23.585Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ac6bac72cdf04f65680ca60
Added to database: 10/07/2026, 21:33:59 UTC
Last updated: 10/07/2026, 21:33:59 UTC
Views: 1
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