Vulnerability in Darylldoyle Svg-Sanitizer
CVE-2026-121446
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/darylldoyle/svg-sanitizer/security/advisories/GHSA-3vh3-jf65-656w (vendor-advisory)
- www.vulncheck.com/advisories/svg-sanitizer-0.5.0-before-1.1.0-incomplete-url-fi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-121446?
- CVE-2026-121446 is a medium-severity vulnerability in Darylldoyle Svg-Sanitizer, classified under CWE-791. CVSS score: 4.3/10. Published 2026-11-03.
- How severe is CVE-2026-121446?
- Medium severity. CVSS v3 base score is 4.3 out of 10.