Description
CSSOM through 0.5.0 contains a denial of service vulnerability in CSSStyleDeclaration.setProperty() that fails to validate reserved property names. Attackers can supply a stylesheet with a declaration named length to replace the internal counter and trigger excessive memory allocation during cssText serialization, causing process termination.
Published: 2026-09-18
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 23 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770
References
Metrics threat_severity

None

threat_severity

Important


Mon, 21 Sep 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Nv
Nv cssom
Vendors & Products Nv
Nv cssom

Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Description CSSOM through 0.5.0 contains a denial of service vulnerability in CSSStyleDeclaration.setProperty() that fails to validate reserved property names. Attackers can supply a stylesheet with a declaration named length to replace the internal counter and trigger excessive memory allocation during cssText serialization, causing process termination.
Title CSSOM through 0.5.0 Denial of Service via length Property
Weaknesses CWE-915
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': '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'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-24T14:23:11.127Z

Reserved: 2026-09-18T16:30:18.480Z

Link: CVE-2026-93752

cve-icon Vulnrichment

Updated: 2026-09-18T19:49:09.720Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-18T18:18:34.320

Modified: 2026-09-22T20:25:55.870

Link: CVE-2026-93752

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-18T17:51:37Z

Links: CVE-2026-93752 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-23T01:45:19Z

Weaknesses