CVE-2026-93752

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-18. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 7.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
—
EPSS %ILE
—
KEV
Not listed

Published

September 18, 2026

Last Modified

September 18, 2026

Advisory Details (5)

Auto-updated Sep 18, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

CSSOM through 0.5.0 Denial of Service via length Property | Advisories | VulnCheck

https://www.vulncheck.com/advisories/cssom-through-0.5.0-denial-of-service-via-length-property
generic🟡 PoC Available

Security Advisory: Unvalidated declaration name in CSSStyleDeclaration.setProperty overwrites the internal `length` field, causing an uncatchable out-of-memory abort · Issue #119 · NV/CSSOM · GitHub

https://github.com/NV/CSSOM/issues/119
generic

CSSOM/lib/CSSStyleDeclaration.js at 00ec21868e12422581c81779135c2f1648441204 · NV/CSSOM · GitHub

https://github.com/NV/CSSOM/blob/00ec21868e12422581c81779135c2f1648441204/lib/CSSStyleDeclaration.js#L41-L56
generic

CSSOM/lib/CSSStyleDeclaration.js at 00ec21868e12422581c81779135c2f1648441204 · NV/CSSOM · GitHub

https://github.com/NV/CSSOM/blob/00ec21868e12422581c81779135c2f1648441204/lib/CSSStyleDeclaration.js#L112-L124
generic

GitHub - NV/CSSOM: Unmaintained! ⚠️ CSS Object Model implemented in pure JavaScript. Also, a CSS parser. · GitHub

https://github.com/NV/CSSOM

Vendor Advisories for CVE-2026-93752(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 8× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 08:37 UTCGHSA enrichment
  2. 2026-09-18 20:31 UTCEG score recompute
  3. 2026-09-18 20:31 UTCGHSA enrichment
  4. 2026-09-18 19:54 UTCEG score recompute
  5. 2026-09-18 19:54 UTCGHSA enrichment
  6. 2026-09-18 18:27 UTCEG score recompute
  7. 2026-09-18 17:54 UTCEG score recompute
  8. 2026-09-18 17:54 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-93752?
CVE-2026-93752 is a high vulnerability published on September 18, 2026. 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…
When was CVE-2026-93752 disclosed?
CVE-2026-93752 was first published in the National Vulnerability Database on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-93752?
CVE-2026-93752 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-93752?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-93752, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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