CVE-2026-40490 — Open Redirect
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CVE-2026-40490 — The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. When redirect following is enabled (followRedirect(true)), versions of AsyncHttpClient prior to 3.0.9 and 2.14.5 forward Authorization and Proxy-Auth
What This Means For You
- If your environment is affected by CWE-200, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-40490 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
Potential Open Redirect and Credential Leak via AsyncHttpClient — CVE-2026-40490
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-40490 | vulnerability | CVE-2026-40490 |
| CWE-200 | weakness | CWE-200 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 18, 2026 at 05:16 UTC |
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