CVE-2026-93752
CSSOM through 0.5.0 Denial of Service via length Property
- State
- Published
- Severity
- 8.7 High
- Published
- Sep 18, 2026
- Updated
- Sep 24, 2026
- Reserved
- Sep 18, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | 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 | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes
Affected Products
| Product | Versions |
|---|---|
CSSOMNV |
|
References
- GitHub Issue #119issue-tracking
- https://github.com/NV/CSSOMproduct
- setProperty() writing a declaration name over the internal length fieldtechnical-description
- cssText getter using the replaced counter as an array boundtechnical-description
- VulnCheck Advisory: CSSOM through 0.5.0 Denial of Service via length Propertythird-party-advisory
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