Information Exposure Affecting async-http-client package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published6 Jun 2026
- disclosed5 Jun 2026
Introduced: 5 Jun 2026
CVE-2026-45300 (opens in a new tab)How to fix?
There is no fixed version for Debian:unstable async-http-client.
NVD Description
Note: Versions mentioned in the description apply only to the upstream async-http-client package and not the async-http-client package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2026-45300
- https://github.com/AsyncHttpClient/async-http-client/commit/3b0e3e9e
- https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.10
- https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-fmxf-pm6p-7xgm