Bug#1139165: async-http-client: CVE-2026-45300

[Salvatore Bonaccorso]

Source: async-http-client
Version: 2.12.3-1
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for async-http-client.

CVE-2026-45300[0]:
| The AsyncHttpClient (AHC) library allows Java applications to easily
| execute HTTP requests and asynchronously process HTTP responses.
| Versions on the 2.x branch prior to 2.15.0 and the 3.x branch prior
| to 3.0.10 leak `Cookie` headers to cross-origin redirect targets.
| When following a redirect to a different origin, the
| `propagatedHeaders()` method in `Redirect30xInterceptor.java` strips
| `Authorization` and `Proxy-Authorization` headers but does not strip
| the `Cookie` header, causing session cookies and other sensitive
| cookie values to be sent to attacker-controlled servers. Versions
| 2.15.0 and 3.0.10 patch the issue.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-45300
    https://www.cve.org/CVERecord?id=CVE-2026-45300
[1] https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-fmxf-pm6p-7xgm
[2] https://github.com/AsyncHttpClient/async-http-client/commit/5eed33962a412a0100f8117dca849930652bfe30

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore