Skip to main content

Exposure of Sensitive Information to an Unauthorized Actor

CVE-2026-45300

Low
0/10

Summary

async-http-client leaks `Cookie` headers to cross-origin redirect targets. When following a redirect across a security boundary (different origin, or HTTPS-HTTP downgrade), the `propagatedHeaders()` method in `Redirect30xInterceptor.java` strips `Authorization` and `Proxy-Authorization` headers but does not strip `Cookie`, so session cookies and other sensitive cookie values are forwarded to the redirect target which may be attacker-controlled. This issue affects async-http-client versions from 2.0.0 prior to 2.15.0 and 3.0.0.Beta1 prior to 3.0.10.

  • LOW
  • NETWORK
  • NONE
  • CHANGED
  • REQUIRED
  • NONE
  • HIGH
  • NONE

CWE-200 - Information Exposure

An information exposure vulnerability is categorized as an information flow (IF) weakness, which can potentially allow unauthorized access to otherwise classified information in the application, such as confidential personal information (demographics, financials, health records, etc.), business secrets, and the application's internal environment.

References

Advisory Timeline

  • Published