AsyncHttpClient: Digest authentication cnonce generated with a non-cryptographic random source
Impact
The client nonce used in HTTP Digest authentication was generated from ThreadLocalRandom, a fast but non-cryptographic pseudorandom number generator. RFC 7616 section 3.3 requires the cnonce to be unpredictable, since it is part of what protects the Digest exchange against chosen-plaintext and precomputation attacks on the credentials. An attacker able to observe or influence enough of the generator's output could reduce the unpredictability the protocol depends on. NTLM (and, on the 3.x line, SCRAM) in this client already use SecureRandom for their own nonces; Digest did not.
Affected versions
- 3.x: up to and including 3.0.11
- 2.x: up to and including 2.16.0
Patches
Fixed in 3.0.12 on the 3.x line and in 2.16.1 on the 2.x line. The cnonce is now generated with SecureRandom, matching the other authentication schemes in the client.
Workarounds
None available from application code.
Details
Realm.Builder's cnonce generation seeded its bytes from ThreadLocalRandom.current() rather than a SecureRandom instance.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Java / Kotlin (Maven) | org.asynchttpclient:async-http-client | >= 3.0.0, < 3.0.12, >= 2.0.0, < 2.16.1 | 3.0.12, 2.16.1 |
Referencias
- https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-mfj3-87qq-382v
- https://nvd.nist.gov/vuln/detail/CVE-2026-107283
- 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
- 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
- Vector CVSS
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N- Debilidad (CWE)
CWE-338- Plataforma
- Java / Kotlin (Maven)
- Paquete
org.asynchttpclient:async-http-client- Publicada
- 08.10.2026
- Actualizado
- 11.10.2026 13:20
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-mfj3-87qq-382v - CC BY 4.0
Historial de vulnerabilidades: org.asynchttpclient:async-http-client
Todas las vulnerabilidades publicadas de este paquete (Java / Kotlin (Maven)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 18
- Primera → última
- 10.2018 10.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 2
- Alta 6
- Media 8
- Baja 2
Divulgaciones por año
- 2018: 1
- 2019: 0
- 2020: 0
- 2021: 0
- 2022: 0
- 2023: 0
- 2024: 1
- 2025: 0
- 2026: 16
-
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