Uncaught Exception Affecting haraka package, versions <3.1.4
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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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Test your applications- Snyk IDSNYK-JS-HARAKA-16009300
- published13 Apr 2026
- disclosed1 Apr 2026
- creditsebastianosrt
Introduced: 1 Apr 2026
CVE-2026-34752 (opens in a new tab)How to fix?
Upgrade Haraka to version 3.1.4 or higher.
Overview
Haraka is an email server with a modular plugin architecture.
Affected versions of this package are vulnerable to Uncaught Exception in the header parsing. An attacker can cause the server process to crash by sending an email with a specially crafted header name such as __proto__, which triggers an unhandled exception and process termination.