CVE-2026-65898 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-65898MEDIUM

cure53 DOMPurify — DOMPurify before 3.4.11 Permanent Attribute Allowlist Pollution via setConfig

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   L   P   N   N   N    5.1   .0017    6.4     —

AFFECTED
  Product    Versions     Fixed
  DOMPurify  unspecified  3.4.11

TIMELINE
  Jul 23  EXPLOIT PUBLISHED — CVE-2026-65898 (cure53 DOMPurify). Public exploit reference added.
  Jul 23  Reserved by VulnCheck
  Jul 23  Published (CNA: VulnCheck)

CWE-79 · CNA: VulnCheck · CVSS v4.0 · 2 references · NVD status: Analyzed

Description

DOMPurify before 3.4.11 fails to clone the ALLOWED_ATTR allowlist when setConfig() is used with an uponSanitizeAttribute hook, allowing the hook to permanently mutate the shared allowlist. Attackers can register a hook that conditionally allows dangerous attributes like onerror for trusted elements, then submit untrusted content that inherits the polluted allowlist and executes event handlers as stored XSS.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 23, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-65898 (cure53 DOMPurify). Public exploit reference added.
July 23, 2026	Reserved	Reserved by VulnCheck
July 23, 2026	Published	Published (CNA: VulnCheck)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
cure53	DOMPurify	—	—	3.4.11

Weaknesses

CWE-79

References (2)

https://github.com/cure53/DOMPurify/security/advisories/GHSA-cmwh-pvxp-8882 [Exploit, Third Party Advisory]
https://www.vulncheck.com/advisories/dompurify-before-permanent-attribute-allowlist-pollution-via-setconfig [Third Party Advisory]

Authoritative record: CVE-2026-65898 at cve.org

Vendors: cure53

Weaknesses: CWE-79

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-65898 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.