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CVE-2026-107282

CRITICAL 9.4

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

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.13 and 2.16.1, cross-host request replay updates the current request but leaves the target request and related proxy context pointing at the original origin. Connection-pool selection, CONNECT handling, realm selection, and TLS setup can consequently send the original host's path, Host header, Authorization credentials, or plaintext request to the replay destination. Documented ResponseFilter failover and retry paths can trigger the replay. This issue is fixed in versions 3.0.13 and 2.16.1.

ELEVATED IMPACT

Severe if exploited (CVSS 9.4), but no known exploitation and low modeled probability. Patch on a normal cadence.

Exploitation likelihood

0.2%chance of exploitation in 30 days · 8th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

9.4CVSS 4.0 · CRITICAL

  • ConfidentialityHigh
  • IntegrityHigh
  • 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
  • ⚠Requirements: Specific conditions must be present

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

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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-319: : Cleartext Transmission of Sensitive Information
  • CWE-441: : Unintended Proxy or Intermediary ('Confused Deputy')
  • CWE-522: : Insufficiently Protected Credentials

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA: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): 3.0.13
    13 explicitly listed affected versions

    3.0.0, 3.0.1, 3.0.10, 3.0.11, 3.0.12, 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": "<= 3.0.12",
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-jmqq-x5g9-9p2w/GHSA-jmqq-x5g9-9p2w.json"
  }
}
    GitHub Advisory Database · GHSA-jmqq-x5g9-9p2w · Updated 2026-10-08T16:45:19.474250752Z
  • 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-jmqq-x5g9-9p2w/GHSA-jmqq-x5g9-9p2w.json"
  }
}
    GitHub Advisory Database · GHSA-jmqq-x5g9-9p2w · Updated 2026-10-08T16:45:19.474250752Z

Vendor product assessments

  • async-http-client as a component of Red Hat Fuse 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not in execute path

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

    Red Hat · CVE-2026-107282 · Updated 2026-10-16T09:44:02+00:00
  • async-http-client-netty-utils as a component of Red Hat Fuse 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not in execute path

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

    Red Hat · CVE-2026-107282 · Updated 2026-10-16T09:44:02+00:00

All CVSS metrics

  • CRITICAL 9.4 v4.0 · CNA Primary
    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
  • CRITICAL 9.4 v4.0 · NVD Secondary
    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

References

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS