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CVE-2026-107283

LOW 3.7

Published 2026-10-07 · Last modified 2026-10-08

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.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.3%chance of exploitation in 30 days · 18th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

3.7CVSS 3.1 · LOW

  • ConfidentialityLow
  • IntegrityNone
  • AvailabilityNone

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ✓User interaction: No user interaction needed
  • ⚠Complexity: Needs a race window or specific setup

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Asynchttpclient

Products Async Http Client

Weakness (CWE)

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

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References and research data (JSON)

Packages and version ranges

Each advisory describes its own package and affected ranges. A boundary applies to that range; it is not a universal upgrade recommendation.

  • org.asynchttpclient:async-http-client Maven

    pkg:maven/org.asynchttpclient/async-http-client

    ECOSYSTEM range
    • Introduced version (included): 3.0.0
    • Fixed boundary (excluded): 3.0.12
    12 explicitly listed affected versions

    3.0.0, 3.0.1, 3.0.10, 3.0.11, 3.0.2, 3.0.3, 3.0.4, 3.0.5, 3.0.6, 3.0.7, 3.0.8, 3.0.9

    Additional upstream package constraints
    {
  "database": {
    "last_known_affected_version_range": "<= 3.0.11",
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mfj3-87qq-382v/GHSA-mfj3-87qq-382v.json"
  }
}
    GitHub Advisory Database · GHSA-mfj3-87qq-382v · Updated 2026-10-08T16:45:19.387990416Z
  • org.asynchttpclient:async-http-client Maven

    pkg:maven/org.asynchttpclient/async-http-client

    ECOSYSTEM range
    • Introduced version (included): 2.0.0
    • Fixed boundary (excluded): 2.16.1
    112 explicitly listed affected versions

    2.0.0, 2.0.1, 2.0.10, 2.0.11, 2.0.12, 2.0.13, 2.0.14, 2.0.15, 2.0.16, 2.0.17, 2.0.18, 2.0.19, 2.0.2, 2.0.20, 2.0.21, 2.0.22, 2.0.23, 2.0.24, 2.0.25, 2.0.26, 2.0.27, 2.0.28, 2.0.29, 2.0.3, 2.0.30, 2.0.31, 2.0.32, 2.0.33, 2.0.34, 2.0.35, 2.0.36, 2.0.37, 2.0.38, 2.0.39, 2.0.4, 2.0.40, 2.0.5, 2.0.6, 2.0.7, 2.0.8, 2.0.9, 2.1.0, 2.1.0-RC1, 2.1.0-RC2, 2.1.0-RC3, 2.1.0-RC4, 2.1.0-alpha1, 2.1.0-alpha10, 2.1.0-alpha11, 2.1.0-alpha12, 2.1.0-alpha13, 2.1.0-alpha14, 2.1.0-alpha15, 2.1.0-alpha16, 2.1.0-alpha17, 2.1.0-alpha18, 2.1.0-alpha19, 2.1.0-alpha2, 2.1.0-alpha20, 2.1.0-alpha21, 2.1.0-alpha22, 2.1.0-alpha23, 2.1.0-alpha24, 2.1.0-alpha25, 2.1.0-alpha26, 2.1.0-alpha3, 2.1.0-alpha4, 2.1.0-alpha5, 2.1.0-alpha6, 2.1.0-alpha7, 2.1.0-alpha8, 2.1.0-alpha9, 2.1.1, 2.1.2, 2.10.0, 2.10.1, 2.10.2, 2.10.3, 2.10.4, 2.10.5, 2.11.0, 2.12.0, 2.12.1, 2.12.2, 2.12.3, 2.12.4, 2.14.5, 2.15.0, 2.16.0, 2.2.0, 2.2.1, 2.3.0, 2.4.0, 2.4.1, 2.4.2, 2.4.3, 2.4.4, 2.4.5, 2.4.6, 2.4.7, 2.4.8, 2.4.9, 2.5.0, 2.5.1, 2.5.2, 2.5.3, 2.5.4, 2.6.0, 2.7.0, 2.8.0, 2.8.1, 2.9.0

    Additional upstream package constraints
    {
  "database": {
    "last_known_affected_version_range": "<= 2.16.0",
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-mfj3-87qq-382v/GHSA-mfj3-87qq-382v.json"
  }
}
    GitHub Advisory Database · GHSA-mfj3-87qq-382v · Updated 2026-10-08T16:45:19.387990416Z

All CVSS metrics

  • LOW 3.7 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
  • LOW 3.7 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS