CVE-2026-107280
Medium
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.
SeverityMedium
CVSS6.9
Exploit probability—
ProductOrg.asynchttpclient:async-http-client
PublishedOct 7, 2026
First seenOct 7, 2026
Weakness typeCWE-1275CWE-1275
How to fix
Update
- org.asynchttpclient:async-http-client3.0.13, 2.16.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| org.asynchttpclient:async-http-clientMaven | 3.0.0 ≤ v < 3.0.13, 2.0.0 ≤ v < 2.16.1 | 3.0.13, 2.16.1 |
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