What is CVE-2026-107283?

CVE-2026-107283 is a low-severity vulnerability in Asynchttpclient Async-Http-Client, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 3.7/10. Published 2026-10-07.

How severe is CVE-2026-107283?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Asynchttpclient Async-Http-Client

CVE-2026-107283

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.

Published 2026-10-07 · last modified 2026-10-08.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Asynchttpclient Async-Http-Client — versions >= 2.0.0, < 2.16.1, >= 3.0.0, < 3.0.12

Weakness classification (CWE)

CWE-338 — Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

References

Frequently asked questions

What is CVE-2026-107283?: CVE-2026-107283 is a low-severity vulnerability in Asynchttpclient Async-Http-Client, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 3.7/10. Published 2026-10-07.
How severe is CVE-2026-107283?: Low severity. CVSS v3 base score is 3.7 out of 10.