Skip to content
Patch Next
Sign inAdd to your agent

← Public intelligence

npm package

xhtml-purifier

Open actionable advisories and recorded vendor fixes. This public package view has no inventory attached and cannot establish whether your deployment is affected. A vendor fix never resolves your finding; verify your installed version and the source guidance.

Open advisories

1 actionable advisory, newest first. Withdrawn advisories and news are excluded. Coverage is partial.

  1. Medium, CVSS 6.1npmAmendedPublished

    xhtml-purifier has HTML attribute-injection (sanitizer bypass) that leads to XSS

    CVE-2026-61784 · GHSA-j8r4-32c5-33rc

    Affected
    • npm xhtml-purifier <= 0.4.1
    Fixed in
    0.4.3· Vendor fix available
    Issue
    xhtml-purifier does not HTML-entity-encode attribute values when serializing its sanitized output. In attributeString() (XHTMLPurifier.js, around line 148) the attribute value is concatenated directly into a double-quoted attribute without encoding. As a result, an attacker-controlled value in any allowed attribute (class, style, title, alt, src, href) can include a double-quote character to break out of the attribute and inject an additional attribute, such as a JavaScript event handler (for example onmouseover or onerror). The injected handler survives sanitization and executes when the output is rendered, which is a sanitizer bypass leading to cross-site scripting. The fix HTML-entity-encodes attribute values before serialization.

    Recommended action: Upgrade to 0.4.3 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

    Sources:github.com (1)osv.dev (2)Source checked Evidence →