Vulnerability · Published Sep 18, 2026 · Assigned by VulnCheck
CVE-2026-93752CSSOM through 0.5.0 Denial of Service via length Property
High 7.5
In plain English
A high-severity security flaw in CSSOM from NV. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.7%top 47.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-915 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- GitHub Issue #119 issue-tracking
- https://github.com/NV/CSSOM product
- setProperty() writing a declaration name over the internal length field technical-description
- cssText getter using the replaced counter as an array bound technical-description
- VulnCheck Advisory: CSSOM through 0.5.0 Denial of Service via length Property third-party-advisory