Vulnerability Intelligence Report
svg-sanitizer before 1.1.0 Quadratic CPU-Exhaustion DoS via PHP-Tag Stripping Loop
CVE-2026-117540
svg-sanitizer from 0.5.3 before 1.1.0 contains a denial of service vulnerability in Sanitizer::sanitize() that repeatedly rescans the whole input while stripping PHP tags. Unauthenticated attackers can upload SVGs with many overlapping PHP tag openers and closers, forcing quadratic preg_replace passes that exhaust worker CPU for minutes.
No Active Exploit Signals
CVSS Base Score
8.7
HIGH
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
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Weaponization
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SSVC Action
—
Weaknesses (CWE)
CWE-407 ↗Inefficient Algorithmic Complexity
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| darylldoyle | svg-sanitizer | 0.5.3 < 1.1.0 (affected), 1.1.0 (unaffected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | VulnCheck · Bug Bounty Provider · USA |
| Reserved | 2026-10-27T10:33:39 |
| Published | 2026-10-27T10:59:34 |
| Patch Date | 2026-10-19 |
| Last Updated | 2026-10-27T10:59:34 |
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