Quick answers
- Is CVE-2026-73116 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-73116 being exploited in the wild.
- How severe is CVE-2026-73116?
- Informational severity, published 5 November 2026.
- Which products and versions are affected?
- Apache Juneau through 9.2.0.
- Is there a fix for CVE-2026-73116?
- Yes: fixed in 9.2.1. Until then: Applications that supply their own HttpClient must disable automatic redirects or strip credential headers on cross-origin redirects themselves, rather than relying on the default RestClient builder behavior. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-73116 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-73116?
- Check whether you run Apache Juneau at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 9.2.1
Applications that supply their own HttpClient must disable automatic redirects or strip credential headers on cross-origin redirects themselves, rather than relying on the default RestClient builder behavior.
Technical details
The RestClient automatically follows HTTP redirects while preserving credential headers (Authorization, Cookie, Proxy-Authorization, X-API-Key) from the original request without checking if the redirect target is cross-origin or downgrades from HTTPS to HTTP. This is a credential leakage vulnerability affecting the redirect handling in the HTTP client builder. The fix in version 9.2.1 strips credential headers on cross-origin redirects; applications using custom HttpClient must implement this protection themselves.
Affected products
- Apache Juneau through 9.2.0
Timeline
- 2026-11-05: disclosed