CVE-2026-88404

CRITICALPre-NVD 9.89.8
EchelonGraph scoreLOW confidence

This critical-severity CVE scores 9.8 under CISA-ADP (Vulnrichment) CVSS v3.1 (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cisa-adp
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 9.8Exploit: None knownExposed: 0

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

A remote code execution (RCE) vulnerability in the UniscriptExecutionService.execute() function (/services/script-execution.service.ts) of Univer v1.0.0-alpha.2 allows attackers to execute arbitrary code via a crafted payload.

CVSS v3
9.8
EG Score
9.8(low)
EG Risk
59(Attend)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
—
EPSS %ILE
—
KEV
Not listed

Published

September 21, 2026

Last Modified

September 22, 2026

Advisory Details (1)

Auto-updated Sep 22, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Arbitrary JavaScript Code Execution via new Function() in Uniscript Execution Service (CWE-94) · Issue #8 · czx1111/cve · GitHub

https://github.com/czx1111/cve/issues/8

Vendor Advisories for CVE-2026-88404(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 7× in last 7d / 7× 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. 2026-09-22 15:20 UTCGHSA enrichment
  2. 2026-09-22 14:37 UTCEG score recompute▲ 9.80
  3. 2026-09-22 14:37 UTCGHSA enrichment
  4. 2026-09-22 14:35 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  5. 2026-09-21 21:22 UTCNVD update
  6. 2026-09-21 21:02 UTCEG score recompute
  7. 2026-09-21 21:01 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2026-88404?
CVE-2026-88404 is a critical vulnerability published on September 21, 2026. A remote code execution (RCE) vulnerability in the UniscriptExecutionService.execute() function (/services/script-execution.service.ts) of Univer v1.0.0-alpha.2 allows attackers to execute arbitrary code via a crafted payload.
When was CVE-2026-88404 disclosed?
CVE-2026-88404 was first published in the National Vulnerability Database on September 21, 2026, with the most recent update on September 22, 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-2026-88404?
CVE-2026-88404 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-88404?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-88404, 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

Explore the affected products and dependency analysis for CVE-2026-88404

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