CVE-2026-31860

MEDIUM

6.1

Description

Unhead is a document head and template manager. Prior to 2.1.11, useHeadSafe() can be bypassed to inject arbitrary HTML attributes, including event handlers, into SSR-rendered <head> tags. This is the composable that Nuxt docs recommend for safely handling user-generated content. The acceptDataAttrs function (safe.ts, line 16-20) allows any property key starting with data- through to the final HTML. It only checks the prefix, not whether the key contains spaces or other characters that break HTML attribute parsing. This vulnerability is fixed in 2.1.11.

Details CVE

Score CVSS v3.16.1

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurREQUIRED

Publie3/12/2026

Derniere modification3/16/2026

Sourcenvd

Observations honeypot0

Produits affectes

unjs:unhead

Faiblesses (CWE)

CWE-79

References

https://github.com/unjs/unhead/security/advisories/GHSA-g5xx-pwrp-g3fv(security-advisories@github.com)

https://github.com/unjs/unhead/security/advisories/GHSA-g5xx-pwrp-g3fv(134c704f-9b21-4f2e-91b3-4a467353bcc0)

Correlations IOC

Aucune correlation enregistree

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