XSS in Darylldoyle Svg-Sanitizer
CVE-2026-107380
savg-sanitizer is a PHP SVG/XML sanitizer. Prior to 1.0.0, svg-sanitizer's isHrefSafeValue() validates an SVG href after XML DTD entity expansion, but saveXML() serializes the original entity reference after removing the DTD declaration. A crafted entity such as Tab can appear to the sanitizer as a safe fragment prefix while HTML5 Named Character Reference resolution during inline HTML rendering later converts the surviving reference to whitespace, exposing a javascript: URL. When an application embeds the sanitized SVG inline, a user who activates the link can cause script to execute in the embedding page's origin. This issue is fixed in version 1.0.0.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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
- Darylldoyle Svg-Sanitizer — versions < 1.0.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-107380?
- CVE-2026-107380 is a medium-severity vulnerability in Darylldoyle Svg-Sanitizer, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-10-08.
- How severe is CVE-2026-107380?
- Medium severity. CVSS v3 base score is 5.4 out of 10.