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Cross-site Scripting (XSS) The advisory has been revoked - it doesn't affect any version of package ruff  (opens in a new tab)

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EPSS
0.33% (24th percentile)

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  • Snyk IDSNYK-RHEL10-RUFF-18871117
  • published1 Sept 2026
  • disclosed23 Jul 2026
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Introduced: 23 Jul 2026

CVE-2026-65911  (opens in a new tab)
CWE-79  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:10.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ruff package and not the ruff package as distributed by RHEL.

In DOMPurify through 3.3.3, function predicates supplied via ADD_ATTR or ADD_TAGS to DOMPurify.sanitize() persist in internal state (EXTRA_ELEMENT_HANDLING) across subsequent sanitize() calls on the same instance. If a later call on the same instance provides ADD_ATTR or ADD_TAGS as an array rather than a function, the previously set function handler is neither cleared nor overwritten, so it continues to approve attacker-controlled attributes or tags. This can allow dangerous event-handler attributes or forbidden tags (bypassing FORBID_TAGS) to survive sanitization, resulting in cross-site scripting. The vendor (Cure53) considers this an edge case outside DOMPurify's threat model; the referenced advisory lists 3.4.0 as the patched version.