ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-107283

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

Published Oct 8, 2026 · catalog updated Oct 8, 2026 · AsyncHttpClient: Digest authentication cnonce

Check if you run it

No confirmed exploitation is on record for CVE-2026-107283. EPSS is 0.26%. Act only if a listed version of AsyncHttpClient: Digest authentication cnonce is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (AsyncHttpClient: Digest authentication cnonce).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low3.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.26%
Remediation
Advisory link
Affected products
Maven org.asynchttpclient:async-http-client

### 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Maven org.asynchttpclient:async-http-client2.0.0 → 2.16.1
  • Maven org.asynchttpclient:async-http-client3.0.0 → 3.0.12

How to fix CVE-2026-107283

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-107283. EPSS is 0.26%. Act only if a listed version of AsyncHttpClient: Digest authentication cnonce is installed.

Which versions are affected?

Compare what you have installed with 2.0.0 → 2.16.1, 3.0.0 → 3.0.12. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-338. EPSS 0.26%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 8, 2026 · GitHub Advisory Database

    Detected

    ### 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

  2. Oct 8, 2026 · GitHub Advisory Database

    Fix available

    org.asynchttpclient:async-http-client fixed in 3.0.12; org.asynchttpclient:async-http-client fixed in 2.16.1

  3. Oct 8, 2026 · GitHub Advisory Database

    Fix available

    org.asynchttpclient:async-http-client fixed in 3.0.12

  4. Oct 8, 2026 · GitHub Advisory Database

    Fix available

    org.asynchttpclient:async-http-client fixed in 2.16.1

  5. Oct 8, 2026 · GitHub Advisory Database

    Updated

    ### 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

Sources

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.