CVE-2026-121444

svg-sanitizer 0.11.0 before 1.1.0 Algorithmic Complexity DoS via use Reference Graph

8.7 High

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.42%Unchanged since Nov 4, 2026

What each source reports

CVE List Score used 8.7

svg-sanitizer 0.11.0 before 1.1.0 Algorithmic Complexity DoS via use Reference Graph

Record: CVE-2026-121444
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-400
Updated: 2026-11-03

EUVDEUVD-2026-115866 8.7

Record: EUVD-2026-115866
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-38xh-8h9r-v3mm 8.7

svg-sanitizer from 0.11.0 before 1.1.0 contains an algorithmic complexity denial of service...

Record: GHSA-38xh-8h9r-v3mm
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-400
Updated: 2026-11-03

NVD 8.7

Record: CVE-2026-121444
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-400
Updated: 2026-11-03

OSV 8.7

svg-sanitizer 0.11.0 before 1.1.0 Algorithmic Complexity DoS via use Reference Graph

Record: CVE-2026-121444
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness: CWE-400
Updated: 2026-11-05

Affected products

darylldoyle svg-sanitizer

History

History
Recorded	Changed	Sources
Nov 4, 2026	aliases, references	CVE List, EUVD, NVD, OSV
Nov 3, 2026	published	EUVD, NVD
Nov 3, 2026	facts, published	EUVD
Nov 3, 2026	aliases, published	EUVD
Nov 3, 2026	first indexed	CVE List, GitHub Advisories

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-121444 is a high vulnerability (CVSS 8.7) in Darylldoyle Svg-sanitizer, published November 3, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.42%, the 36th percentile. No source names a fixed version.