Weak random source for Digest nonce in AsyncHttpClient
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- Low · 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.
Summary
AsyncHttpClient async-http-client from 3.0.0 before 3.0.12 and from 2.0.0 before 2.16.1 generates the HTTP Digest client nonce with ThreadLocalRandom. ThreadLocalRandom is not a cryptographically secure source, a weakness classified as CWE-338. An observer able to infer the generator state can predict the cnonce and reduce the protection of the Digest authentication exchange. The attack complexity is high and no privileges are required over the network.
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, Realm.Builder generates the HTTP Digest client nonce with ThreadLocalRandom rather than a cryptographically secure random source. Digest relies on an unpredictable cnonce to resist chosen-plaintext and credential precomputation attacks, so an observer able to infer generator state can reduce the protection of the authentication exchange. 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-mfj3-87qq-382v |
| — | org.asynchttpclient:async-http-client (Maven) | 2.0.0 to before 2.16.1 | 2.16.1 | Patch available | GHSA-mfj3-87qq-382v |
- 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-mfj3-87qq-382v
- org.asynchttpclient:async-http-client (Maven) Vendor— Affected 2.0.0 to before 2.16.1 Fixed in 2.16.1 Patch available GHSA-mfj3-87qq-382v
Remediation
Upgrade async-http-client to version 3.0.12 or 2.16.1, which fix this issue. Red Hat rates this Low and 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-mfj3-87qq-382v org.asynchttpclient:async-http-client (Maven) Fixed in 3.0.12 Advisory →
- Fix · GHSA-mfj3-87qq-382v org.asynchttpclient:async-http-client (Maven) Fixed in 2.16.1 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Low. 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-2026-107283
- 2026-10-08 CISA SSVC decision points changed
- 2026-10-08 Alias added: GHSA-mfj3-87qq-382v
- 2026-10-08 Fix available: Maven/org.asynchttpclient:[email protected], Maven/org.asynchttpclient:[email protected] · GHSA-mfj3-87qq-382v
- 2026-10-08 CVSS score added · GHSA-mfj3-87qq-382v
- 2026-10-08 Weakness changed · GHSA-mfj3-87qq-382v
- 2026-10-08 7 new references · GHSA-mfj3-87qq-382v
- 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-mfj3-87qq-382v
- https://github.com/AsyncHttpClient/async-http-client/commit/dca2d90db87f0144ea893a6858dca13c426d06b6
- https://github.com/AsyncHttpClient/async-http-client/commit/e1f5fc88fe211d3f64032c33b91093ba3d5e793d
- 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-2026-107283 · CVE Program
- CVE-2026-107283 · NVD
- FIRST EPSS
- GHSA-mfj3-87qq-382v · GitHub Advisory Database · CC BY 4.0
- CVE-2026-107283 · Red Hat security data · CC BY 4.0
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