AsyncHttpClient leaks proxy credentials to origin over WebSocket
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-319.
Summary
The AsyncHttpClient library (async-http-client), from 3.0.0 before 3.0.12 and from 2.0.0 before 2.16.1, sends the proxy's Proxy-Authorization value to the origin server. Proxied WebSocket (ws) requests are tunneled through CONNECT, but the proxy credentials are attached because the scheme is not marked secure (CWE-319). A remote attacker with high attack complexity can recover Basic credentials directly or replay and crack Digest responses offline.
Written with Claude Haiku 5.5 from the sources below · 2026-11-03
Description from the CNA
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.12 and 2.16.1, a proxied ws request is carried through CONNECT, but NettyRequestFactory.newNettyRequest and requestUri decide whether to attach proxy authentication and an absolute-form target only from whether the URI is secure. Because ws is not marked secure, the tunneled WebSocket upgrade sent to the origin includes the proxy's Proxy-Authorization value. Basic credentials are directly recoverable and Digest responses can be replayed or cracked offline. This issue is fixed in versions 3.0.12 and 2.16.1.
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 | 3.0.0 to before 3.0.12; 2.0.0 to before 2.16.1 | 3.0.12, 2.16.1 | Patch available | CNA |
| — | org.asynchttpclient:async-http-client (Maven) | 3.0.0 to before 3.0.12 | 3.0.12 | Patch available | GHSA-3wp9-xfwm-rjjf |
| — | org.asynchttpclient:async-http-client (Maven) | 2.0.0 to before 2.16.1 | 2.16.1 | Patch available | GHSA-3wp9-xfwm-rjjf |
- async-http-client VendorAsyncHttpClient Affected 3.0.0 to before 3.0.12; 2.0.0 to before 2.16.1 Fixed in 3.0.12, 2.16.1 Patch available CNA
- org.asynchttpclient:async-http-client (Maven) Vendor— Affected 3.0.0 to before 3.0.12 Fixed in 3.0.12 Patch available GHSA-3wp9-xfwm-rjjf
- org.asynchttpclient:async-http-client (Maven) Vendor— Affected 2.0.0 to before 2.16.1 Fixed in 2.16.1 Patch available GHSA-3wp9-xfwm-rjjf
Remediation
Upgrade async-http-client to 3.0.12 or 2.16.1. Red Hat lists Red Hat Fuse 7 as affected with no fix planned.
Written with Claude Haiku 5.5 from the sources below · 2026-11-03
- Fix · CNA async-http-client (AsyncHttpClient) Fixed in 3.0.12, 2.16.1
- Fix · GHSA-3wp9-xfwm-rjjf org.asynchttpclient:async-http-client (Maven) Fixed in 3.0.12 Advisory →
- Fix · GHSA-3wp9-xfwm-rjjf 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 | No fix planned: Out of support scope |
Timeline
- 2026-10-07 Threatist record created from CVE-2026-107285
- 2026-10-08 Alias added: GHSA-3wp9-xfwm-rjjf
- 2026-10-08 Fix available: Maven/org.asynchttpclient:[email protected], Maven/org.asynchttpclient:[email protected] · GHSA-3wp9-xfwm-rjjf
- 2026-10-08 CVSS score added · GHSA-3wp9-xfwm-rjjf
- 2026-10-08 Weakness changed · GHSA-3wp9-xfwm-rjjf
- 2026-10-08 7 new references · GHSA-3wp9-xfwm-rjjf
- 2026-10-08 CISA SSVC decision points changed
- 2026-10-08 Priority changed: MEDIUM → LOW
- 2026-11-03 Affected versions changed · Red Hat
- 2026-11-03 CVSS score added · Red Hat
References
Other 6
- https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-3wp9-xfwm-rjjf
- https://github.com/AsyncHttpClient/async-http-client/commit/6e9cb75a9b7259353f983fc90ca28b1da3742e18
- https://github.com/AsyncHttpClient/async-http-client/commit/c4feab0f7f86d61505a48e40d383c8a375a22e18
- https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1
- https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.12
- 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-2026-107285 · CVE Program
- CVE-2026-107285 · NVD
- FIRST EPSS
- GHSA-3wp9-xfwm-rjjf · GitHub Advisory Database · CC BY 4.0
- CVE-2026-107285 · Red Hat security data · CC BY 4.0
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