Is CVE-2026-121444 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-121444?

CVE-2026-121444 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-121444

Description

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.