Incomplete List of Disallowed Inputs Affecting unhead package, versions <2.1.13
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-UNHEAD-15965923
- published10 Apr 2026
- disclosed9 Apr 2026
- creditFahad Khan
Introduced: 9 Apr 2026
NewCVE-2026-39315 (opens in a new tab)How to fix?
Upgrade unhead to version 2.1.13 or higher.
Overview
unhead is a Full-stack manager built for any framework.
Affected versions of this package are vulnerable to Incomplete List of Disallowed Inputs in the hasDangerousProtocol() function though the usage of HtmlEntityHex and HtmlEntityDec RegExp. An attacker can inject malicious URIs into the document head by crafting input with leading-zero padded HTML entities that bypass protocol checks, resulting in the browser interpreting blocked URI schemes.