CVE-2026-65912

🔶 medium

Summary

DOMPurify before 3.3.2 contains a URI validation bypass vulnerability when ADD_ATTR is provided as a predicate function via EXTRA_ELEMENT_HANDLING.attributeCheck. Attackers can supply a predicate that accepts specific attribute and tag combinations to bypass URI-safe validation, allowing unsafe protocols like javascript: to survive sanitization and execute as DOM-based XSS when the link is activated.

CVSS Score

6.1

Medium

EPSS Score

0.2

Exploit Probability

Published Date

2026-07-23

First Seen: 2026-07-31

📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 38.4% of all 340,620 vulnerabilities in our database.

#209,905

Below average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: Jul 23, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Partial

Limited system impact

🏆 Discovered By

christos-eth (reporter)

SSVC data provided by CISA

Last Modified 2026-07-28

Source NVD 🔗

CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS Vector 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CWE IDs (Weakness Types)

CWE-79

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
cure53	dompurify	Affected	< 3.3.2

🔗 References 2

https://github.com/cure53/DOMPurify/security/advisor...

Third Party Advisory

https://www.vulncheck.com/advisories/dompurify-befor...

Third Party Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-65898	⚠️ high	7.2	0.2	DOMPurify before 3.4.11 fails to clone the ALLOWED_ATTR allowlist when setConfig() is used with an uponSanitizeAttribute...	2026-07-23
CVE-2026-65899	🔶 medium	6.1	0.2	DOMPurify 3.0.0 before 3.4.9 does not reset the retained Trusted Types policy when clearConfig() is called, so a DOMPuri...	2026-07-23
CVE-2026-65900	🔶 medium	6.1	0.2	DOMPurify versions >=3.0.0 and before 3.4.8, when configured with SAFE_FOR_TEMPLATES together with a DOM output mode (RE...	2026-07-23
CVE-2026-65901	🔶 medium	6.1	0.2	DOMPurify through 3.4.6 contains a cross-site scripting vulnerability in IN_PLACE mode that trusts attacker-controlled n...	2026-07-23
CVE-2026-65902	🔶 medium	6.1	0.2	DOMPurify before 3.4.7 (affected versions <= 3.4.5) passes direct references to the module-level DEFAULT_ALLOWED_TAGS an...	2026-07-23
CVE-2026-65903	🔶 medium	6.1	0.2	DOMPurify before 3.4.0 contains a logic error in the ADD_TAGS function where short-circuit evaluation allows forbidden t...	2026-07-23

These CVEs affect the same products