Authorization Bypass Through User-Controlled Key Affecting agents package, versions <0.3.7
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JS-AGENTS-15209148
- published9 Feb 2026
- disclosed3 Feb 2026
- creditUnknown
Introduced: 3 Feb 2026
NewCVE-2026-1664 (opens in a new tab)How to fix?
Upgrade agents to version 0.3.7 or higher.
Overview
agents is an A home for your AI agents
Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key via the createHeaderBasedEmailResolver function. An attacker can redirect inbound email to arbitrary internal objects by manipulating the Message-ID and References headers without proper validation.