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Vulnerability · Published Oct 7, 2026 · Assigned by GitHub_M

CVE-2026-107283AsyncHttpClient: Digest authentication cnonce generated with a non-cryptographic random source

Low 3.7

In plain English

A low-severity security flaw in async-http-client from AsyncHttpClient. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.7Low
Exploit odds (30 days)0.3%top 81.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12async-http-clientno fix listedDEBIAN-CVE-2026-107283
Mavenorg.asynchttpclient:async-http-client3.0.12GHSA-mfj3-87qq-382v
Mavenorg.asynchttpclient:async-http-client2.16.1GHSA-mfj3-87qq-382v
Ubuntu:22.04:LTSasync-http-clientno fix listedUBUNTU-CVE-2026-107283
Ubuntu:24.04:LTSasync-http-clientno fix listedUBUNTU-CVE-2026-107283
Ubuntu:26.04:LTSasync-http-clientno fix listedUBUNTU-CVE-2026-107283
Ubuntu:26.10async-http-clientno fix listedUBUNTU-CVE-2026-107283

Affected products (as reported)

VendorProductVersions
AsyncHttpClient async-http-client >= 3.0.0, < 3.0.12>= 2.0.0, < 2.16.1

Weakness: CWE-338 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References