SB2026061604 - Sensitive cookie with improper SameSite attribute in Async-http-client

Description

This security bulletin contains information about 1 vulnerability.

1) Sensitive cookie with improper SameSite attribute (CVE-ID: N/A)

CWE-ID: CWE-1275 - Sensitive Cookie with Improper SameSite Attribute

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to manipulate cookies for an unrelated domain.

The vulnerability exists due to improper cookie domain validation in ThreadSafeCookieStore when storing cookies from HTTP responses. A remote attacker can cause the client to connect to an attacker-influenced host that sets a crafted cookie to manipulate cookies for an unrelated domain.

Applications are exposed when a single AsyncHttpClient instance shares its cookie store across both attacker-influenced and trusted hosts, such as when following redirects or fetching user-supplied URLs.

Remediation

Install update from vendor's website.

References

• https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-m452-q8c9-rg2f
• https://github.com/AsyncHttpClient/async-http-client/pull/2196