Information disclosure in Asynchttpclient Async-Http-Client
CVE-2026-85717
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.14.5 to 2.16.0 and from 3.0.9 to 3.0.11, a client configured with a client-wide Realm and redirect following can disclose credentials after a cross-origin redirect because the Interceptors authentication path falls back to the client configuration after redirect handling clears the per-exchange realm. If the attacker-controlled target returns 401, the client can send Basic or Digest credentials or a Negotiate or NTLM token to that origin. Per-request realms are stripped correctly, and this issue is a residual bypass of the earlier cross-origin credential-stripping fixes. This issue is fixed in versions 2.16.1 and 3.0.12.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (44.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Asynchttpclient Async-Http-Client — versions >= 2.14.5, < 2.16.1, >= 3.0.9, < 3.0.12
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-85717?
- CVE-2026-85717 is a medium-severity vulnerability in Asynchttpclient Async-Http-Client, classified under Information Disclosure. CVSS score: 6.8/10. Published 2026-09-17.
- How severe is CVE-2026-85717?
- Medium severity. CVSS v3 base score is 6.8 out of 10.