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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
NV CSSOM unaffected
Version Status Constraints
0 affected ≤ 0.5.0

No data.

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/NV/CSSOM cve-icon cve-icon
https://github.com/NV/CSSOM/blob/00ec21868e12422581c81779135c2f1648441204/lib/CSSStyleDeclaration.js#L112-L124 cve-icon cve-icon
https://github.com/NV/CSSOM/blob/00ec21868e12422581c81779135c2f1648441204/lib/CSSStyleDeclaration.js#L41-L56 cve-icon cve-icon
https://github.com/NV/CSSOM/issues/119 cve-icon cve-icon cve-icon
https://www.vulncheck.com/advisories/cssom-through-0.5.0-denial-of-service-via-length-property cve-icon cve-icon
History

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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-18T19:49:14.421Z

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 : Received

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

Modified: 2026-09-18T20:17:33.640

Link: CVE-2026-93752

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses