CVE-2026-121446

MEDIUM 4.3

svg-sanitizer 0.5.0 before 1.1.0 Incomplete url() Filtering in SVG Attributes

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

svg-sanitizer from 0.5.0 before 1.1.0 contains an incomplete filtering vulnerability that allows attackers to bypass remote URL removal by using CSS escape sequences inside url() in SVG presentation attributes. Attackers can supply SVG files with attributes like fill containing escaped slashes that browsers resolve to remote URLs, triggering external requests and enabling data exfiltration.

CWE	CWE-791
Vendor	darylldoyle
Product	svg-sanitizer
Published	Nov 3, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

darylldoyle / svg-sanitizer

0.5.0 < 1.1.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/darylldoyle/svg-sanitizer/security/advisories/GHSA-3vh3-jf65-656w vulncheck.com: https://www.vulncheck.com/advisories/svg-sanitizer-0.5.0-before-1.1.0-incomplete-url-filtering-in-svg-attributes

Credits

🔍 Rudloff 🔍 AlpetGexha