CVE-2026-121444
svg-sanitizer 0.11.0 before 1.1.0 Algorithmic Complexity DoS via use Reference Graph
svg-sanitizer from 0.11.0 before 1.1.0 contains an algorithmic complexity denial of service vulnerability in hasInfiniteLoop() and countUse() of the use reference-graph analysis. Attackers can upload a small layered SVG with 15 levels of fanned-out use elements, forcing exponential path enumeration that pins PHP workers for hours.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| svg-sanitizer darylldoyle |
≥ 0.11.0; < 1.1.0 (affected, semver) 1.1.0 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.7 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/darylldoyle/svg-sanitizer/security/advisories/GHSA-hrwm-vcc9-hcm4CNA: VulnCheck · vendor-advisory
- https://www.vulncheck.com/advisories/svg-sanitizer-0.11.0-before-1.1.0-algorithmic-complexity-dos-via-use-reference-graphCNA: VulnCheck · third-party-advisory
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