Pooled connections shared across logins in AsyncHttpClient
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-346.
Summary
AsyncHttpClient versions from 2.0.0 through 2.16.1 and from 3.0.0 before 3.0.14 are affected. Connection pool partitioning omits identity-defining fields for Kerberos, SPNEGO, NTLM and authenticated proxy connections (CWE-346). A remote attacker with no privileges or user interaction can, in certain login setups, get a later request run under another identity and expose that identity's data or authority.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.0.0 until 3.0.14, connection-pool partitioning still omits identity-defining fields for Kerberos, SPNEGO, NTLM, and authenticated proxy connections. Logins without a configured principal, proxy realms, identities sharing a user name, and SOCKS or CONNECT proxy logins can reuse a socket authenticated as a different identity. A later request is then executed under the first identity and can expose that identity's data or authority to another caller. In the affected execution path, SpnegoEngine, NTLM, Kerberos, SPNEGO, SOCKS, and CONNECT control or expose the vulnerable behavior. This issue is fixed in version 3.0.14.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
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 3.0.14; 2.0.0 – 2.16.1 | 3.0.14 | Patch available | CNA |
| — | org.asynchttpclient:async-http-client (Maven) | 3.0.0 to before 3.0.14 | 3.0.14 | Patch available | GHSA-v2j5-22fr-j62r |
| — | org.asynchttpclient:async-http-client (Maven) | 2.0.0 – 2.16.1 | — | No fix listed | GHSA-v2j5-22fr-j62r |
- async-http-client VendorAsyncHttpClient Affected 3.0.0 to before 3.0.14; 2.0.0 – 2.16.1 Fixed in 3.0.14 Patch available CNA
- org.asynchttpclient:async-http-client (Maven) Vendor— Affected 3.0.0 to before 3.0.14 Fixed in 3.0.14 Patch available GHSA-v2j5-22fr-j62r
- org.asynchttpclient:async-http-client (Maven) Vendor— Affected 2.0.0 – 2.16.1 Fixed in — No fix listed GHSA-v2j5-22fr-j62r
Remediation
Upgrade org.asynchttpclient:async-http-client to 3.0.14, which fixes this issue. The sources list no fixed version for async-http-client.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
- Fix · CNA async-http-client (AsyncHttpClient) Fixed in 3.0.14
- Fix · GHSA-v2j5-22fr-j62r org.asynchttpclient:async-http-client (Maven) Fixed in 3.0.14 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 1 product
- Red Hat Fuse 7
Timeline
- 2026-10-07 Threatist record created from CVE-2026-107230
- 2026-10-08 Alias added: GHSA-v2j5-22fr-j62r
- 2026-10-08 Fix available: Maven/org.asynchttpclient:[email protected] · GHSA-v2j5-22fr-j62r
- 2026-10-08 CVSS score added · GHSA-v2j5-22fr-j62r
- 2026-10-08 Weakness changed · GHSA-v2j5-22fr-j62r
- 2026-10-08 5 new references · GHSA-v2j5-22fr-j62r
- 2026-10-08 CISA SSVC decision points changed
- 2026-10-08 Priority changed: MEDIUM → LOW
- 2026-10-09 Affected versions changed · Red Hat
- 2026-10-09 CVSS score added · Red Hat
References
Other 4
- https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-v2j5-22fr-j62r
- https://github.com/AsyncHttpClient/async-http-client/commit/d3bb4d68b41acf5d3ab7541afa9fdfe7ec3ba054
- https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.14
- 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-2026-107230 · CVE Program
- CVE-2026-107230 · NVD
- FIRST EPSS
- GHSA-v2j5-22fr-j62r · GitHub Advisory Database · CC BY 4.0
- CVE-2026-107230 · Red Hat security data · CC BY 4.0
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