CVE-2026-88362

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-24. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

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

MuJS e892c9fdb contains an incorrect numeric conversion vulnerability in jsR_isindex() in jsrun.c. A specially crafted JavaScript input containing an excessively large numeric array index can cause an out-of-range floating-point value to be converted to an integer without proper range validation. This results in undefined behavior and can cause process termination, leading to denial of service.

CVSS v3
7.5
EG Score
7.5HIGHhigh confidence
EG Risk
65
EG Risk 65/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
25th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 24, 2026

Last Modified

September 25, 2026

Advisory Details (2)

Auto-updated Sep 25, 2026
No patch confirmed yet.
generic

mujs.git - MuJS: a Javascript interpreter

https://cgit.ghostscript.com/cgi-bin/cgit.cgi/mujs.git/commit/?id=8a32c397b28fe45747ac4e9e4f3dca049825eda7
generic

709636 – Undefined behavior in jsR_isindex (jsrun.c:1569): huge double assigned to int for array index -> float-to-int conversion overflow

https://bugs.ghostscript.com/show_bug.cgi?id=709636

Vendor Advisories for CVE-2026-88362(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
mujs1.3.10-1 ... 1.3.9-1 (12 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
mujs1.3.10-1 ... 1.3.9-1 (7 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
mujs1.3.10-1 ... 1.3.9-1 (6 versions)
  • every version up to 1.3.10-2: fixed in 1.3.10-2
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 42× 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. 2026-10-05 01:23 UTCEG score recompute
  2. 2026-10-05 01:23 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 12:18 UTCGHSA enrichment
  5. 2026-10-03 23:13 UTCEG score recompute
  6. 2026-10-03 23:13 UTCGHSA enrichment
  7. 2026-10-03 10:07 UTCGHSA enrichment
  8. 2026-10-02 21:01 UTCEG score recompute
  9. 2026-10-02 21:01 UTCGHSA enrichment
  10. 2026-10-02 07:55 UTCEG score recompute
  11. 2026-10-02 07:55 UTCGHSA enrichment
  12. 2026-10-01 19:51 UTCEPSS rescore
  13. 2026-10-01 18:49 UTCGHSA enrichment
  14. 2026-10-01 05:42 UTCGHSA enrichment
  15. 2026-09-30 16:37 UTCEG score recompute
  16. 2026-09-30 16:37 UTCGHSA enrichment
  17. 2026-09-30 15:04 UTCEPSS rescore
  18. 2026-09-30 02:34 UTCEG score recompute
  19. 2026-09-30 02:34 UTCGHSA enrichment
  20. 2026-09-29 13:29 UTCGHSA enrichment
  21. 2026-09-29 00:24 UTCEG score recompute
  22. 2026-09-29 00:24 UTCGHSA enrichment
  23. 2026-09-28 13:52 UTCEPSS rescore
  24. 2026-09-28 11:19 UTCGHSA enrichment
  25. 2026-09-27 22:14 UTCEG score recompute
Show 17 more
  1. 2026-09-27 22:14 UTCGHSA enrichment
  2. 2026-09-27 13:48 UTCEPSS rescore
  3. 2026-09-27 09:08 UTCGHSA enrichment
  4. 2026-09-26 20:00 UTCEG score recompute
  5. 2026-09-26 20:00 UTCGHSA enrichment
  6. 2026-09-26 15:59 UTCEPSS rescore
  7. 2026-09-26 06:52 UTCEG score recompute
  8. 2026-09-26 06:52 UTCGHSA enrichment
  9. 2026-09-25 17:44 UTCEG score recompute
  10. 2026-09-25 17:44 UTCGHSA enrichment
  11. 2026-09-25 16:24 UTCEG score recompute▲ 7.50
  12. 2026-09-25 16:24 UTCGHSA enrichment
  13. 2026-09-25 16:24 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  14. 2026-09-24 21:16 UTCGHSA enrichment
  15. 2026-09-24 16:30 UTCNVD update
  16. 2026-09-24 15:47 UTCEG score recompute
  17. 2026-09-24 15:46 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-88362?
CVE-2026-88362 is a high vulnerability published on September 24, 2026. MuJS e892c9fdb contains an incorrect numeric conversion vulnerability in jsR_isindex() in jsrun.c. A specially crafted JavaScript input containing an excessively large numeric array index can cause an out-of-range floating-point value to be converted to an integer without proper range validation.…
When was CVE-2026-88362 disclosed?
CVE-2026-88362 was first published on September 24, 2026, with the most recent update on September 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-88362 actively exploited?
CVE-2026-88362 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (25th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-88362?
CVE-2026-88362 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-88362?
No fix for CVE-2026-88362 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-88362 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-88362

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