CVE-2026-45300 Details
Description
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Versions on the 2.x branch prior to 2.15.0 and the 3.x branch prior to 3.0.10 leak `Cookie` headers to cross-origin redirect targets. When following a redirect to a different origin, the `propagatedHeaders()` method in `Redirect30xInterceptor.java` strips `Authorization` and `Proxy-Authorization` headers but does not strip the `Cookie` header, causing session cookies and other sensitive cookie values to be sent to attacker-controlled servers. Versions 2.15.0 and 3.0.10 patch the issue.
A vulnerability in the AsyncHttpClient library in certain 2.x and 3.x versions allows for the unintentional transmission of Cookie headers to cross-origin redirect destinations. This issue arises because, while the library removes Authorization and Proxy-Authorization headers when following a redirect to a different origin, it fails to do the same for Cookie headers. As a result, session cookies and other sensitive cookie information can be sent to potentially malicious servers.
Users can upgrade to AsyncHttpClient versions 3.0.10 or 2.15.0 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 8, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-fmxf-pm6p-7xgm | CISA-ADP | ExploitMitigationPatchVendor Advisory |
| https://github.com/AsyncHttpClient/async-http-client/commit/3b0e3e9e | [email protected] | Patch |
| https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.10 | [email protected] | ProductRelease Notes |
| https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-fmxf-pm6p-7xgm | [email protected] | ExploitMitigationPatchVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-200 | Exposure of Sensitive Information to an Unauthorized Actor | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| asynchttpclient project async-http-client | >= 2.0.0, < 2.15.0 >= 3.0.0, < 3.0.10 |
CPE
Remediation
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Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 8, 2026 | Initial Analysis | [email protected] |
| Jun 8, 2026 | CVE Modified | CISA-ADP |
| Jun 5, 2026 | New CVE Received | [email protected] |