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Back to active CVEs
High · CVSS 8.7CVE-2026-117540

svg-sanitizer before 1.1.0 Quadratic CPU-Exhaustion DoS via PHP-Tag Stripping LoopCVE-2026-117540

Answer in brief

CVE-2026-117540 records a High severity (CVSS 8.7) vulnerability in svg-sanitizer before 1.1.0 Quadratic CPU-Exhaustion DoS via PHP-Tag Stripping Loop. The current sources do not mark it as known exploited. The current feed maps darylldoyle/svg-sanitizer (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 27, 2026Updated Oct 27, 2026Source checked Oct 27, 2026First seen by HOL Oct 27, 2026Material review Oct 27, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.7
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps darylldoyle/svg-sanitizer (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
darylldoyle/svg-sanitizergeneric>=0.5.3 <1.1.01.1.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for darylldoyle/svg-sanitizer.
  2. 2Review the reported fix. Update darylldoyle/svg-sanitizer to 1.1.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 27, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • darylldoyle svg-sanitizer before 1.0.0 CSS Injection and Remote Reference BypassSame darylldoyle/svg-sanitizer package
  • svg-sanitizer 0.11.0 before 1.1.0 Uncaught LogicException DoS via sanitize()Same darylldoyle/svg-sanitizer package
  • Semantic MediaWiki 3.0.0 before 7.3.1 Denial of Service via Special:Search Compact FiltersAlso CWE-407

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-407
Source
CVE List V5
Source checked
Oct 27, 2026
References
3 linked sources
Open source record