CVE-2026-107283 AsyncHttpClient: Digest authentication cnonce generated with a non-cryptographic random source
AsyncHttpClient uses non-cryptographic randomness for Digest authentication nonces, allowing attackers to potentially bypass authentication protections.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-107283?
CVE-2026-107283 is a low-severity vulnerability in AsyncHttpClient async-http-client, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-338
Which versions are affected by CVE-2026-107283?
4 open source packages ship an affected version, including org.asynchttpclient:async-http-client.
| Package | Affected | Fixed in |
|---|---|---|
org.asynchttpclient:async-http-client Maven | From 2.0.0 | 2.16.1 |
org.asynchttpclient:async-http-client Maven | From 2.0.0 | 2.16.1 |
org.asynchttpclient:async-http-client Maven | From 3.0.0 | 3.0.12 |
org.asynchttpclient:async-http-client Maven | From 3.0.0 | 3.0.12 |
How do I fix CVE-2026-107283?
Upgrade org.asynchttpclient:async-http-client to a fixed version for your release line: 2.16.1 or 3.0.12.
Is CVE-2026-107283 being exploited?
There is no known exploitation of CVE-2026-107283 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-107283, ECHO-976a-ccb0-f1c8, GHSA-mfj3-87qq-382v, MINI-2rg5-cpm8-5mcj, MINI-3ww8-2xxm-9gfv, MINI-hmmj-v8mg-7xfq and 2 more.