AsyncHttpClient: Client-wide realm credentials re-sent to a cross-origin redirect target
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-200.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| AsyncHttpClient | async-http-client | 2.14.5 to before 2.16.1; 3.0.9 to before 3.0.12 | 2.16.1, 3.0.12 | Patch available | CNA |
| — | org.asynchttpclient:async-http-client (Maven) | 3.0.9 to before 3.0.12 | 3.0.12 | Patch available | GHSA-f8m2-889x-vw4x |
| — | org.asynchttpclient:async-http-client (Maven) | 2.14.5 to before 2.16.1 | 2.16.1 | Patch available | GHSA-f8m2-889x-vw4x |
- async-http-client VendorAsyncHttpClient Affected 2.14.5 to before 2.16.1; 3.0.9 to before 3.0.12 Fixed in 2.16.1, 3.0.12 Patch available CNA
- org.asynchttpclient:async-http-client (Maven) Vendor— Affected 3.0.9 to before 3.0.12 Fixed in 3.0.12 Patch available GHSA-f8m2-889x-vw4x
- org.asynchttpclient:async-http-client (Maven) Vendor— Affected 2.14.5 to before 2.16.1 Fixed in 2.16.1 Patch available GHSA-f8m2-889x-vw4x
Remediation
- Fix · CNA async-http-client (AsyncHttpClient) Fixed in 2.16.1, 3.0.12
- Fix · GHSA-f8m2-889x-vw4x org.asynchttpclient:async-http-client (Maven) Fixed in 3.0.12 Advisory →
- Fix · GHSA-f8m2-889x-vw4x org.asynchttpclient:async-http-client (Maven) Fixed in 2.16.1 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Fuse 7 | Affected | — |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-85717
- 2026-10-03 Alias added: GHSA-f8m2-889x-vw4x
- 2026-11-06 Affected versions changed · Red Hat
- 2026-11-06 CVSS score added · Red Hat
References
Other 5
- https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-f8m2-889x-vw4x
- https://github.com/AsyncHttpClient/async-http-client/pull/2224
- https://github.com/AsyncHttpClient/async-http-client/commit/43db7bba81430cbd61ec2dc2c7be464e0ff6a0ff
- https://github.com/AsyncHttpClient/async-http-client/commit/b66757bec34def2e9867bb2b77bd848b1112abb4
- https://github.com/AsyncHttpClient/async-http-client
More AsyncHttpClient vulnerabilities
- TI-2024-36149 AsyncHttpClient (AHC) library's `CookieStore` replaces explicitly defined `Cookie`s CVSS 4.0CRITICAL 9.2
- TI-2026-69321 Cross-host replay in AsyncHttpClient leaks credentials to new host CVSS 4.0CRITICAL 9.4
- TI-2026-69315 AsyncHttpClient sends passwords in cleartext after Digest downgrade CVSS 4.0HIGH 8.7
- TI-2026-58825 AsyncHttpClient: Unbounded HTTP/1.1 response decompression enables a decompression-bomb denial of service CVSS 3.1HIGH 7.5
- TI-2026-69311 Unbounded WebSocket decompression in AsyncHttpClient enables DoS CVSS 3.1HIGH 7.5
- TI-2026-58823 AsyncHttpClient: SOCKS proxy credentials sent to the origin server over plaintext HTTP CVSS 3.1HIGH 7.5
Sources
- CVE-2026-85717 · CVE Program
- CVE-2026-85717 · NVD
- FIRST EPSS
- GHSA-f8m2-889x-vw4x · GitHub Advisory Database · CC BY 4.0
- CVE-2026-85717 · Red Hat security data · CC BY 4.0
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