AsyncHttpClient: Replay to a different host sends the original host request and credentials to the new host

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-107282
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-07 22:17:04 UTC
Updated2026-10-07 22:17:04 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v4.0 9.4 CRITICAL from [email protected]

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

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

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary9.4CRITICALCVSS: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/C...
4.0CNADECLARED9.4CRITICALCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
High
Attack Requirements
Present
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
None
Sub Conf.
High
Sub Integrity
High
Sub Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA AsyncHttpClient Async-http-client affected >= 3.0.0, < 3.0.13 Not specified
CNA AsyncHttpClient Async-http-client affected >= 2.0.0, < 2.16.1 Not specified

References

ReferenceSourceLinkTags
github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-cli... [email protected] github.com
github.com/AsyncHttpClient/async-http-client/commit/15b254514a411623e5f1... [email protected] github.com
github.com/AsyncHttpClient/async-http-client/commit/bbc31aed3b044f9f7a12... [email protected] github.com
github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-jm... [email protected] github.com
github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-cli... [email protected] github.com
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