CVE-2026-103626

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreHIGH confidence

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-10-02. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this week
9.6EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 9.6Exploit: None knownExposed services: Not assessed

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

Incorrect authorization in FileSystem in Google Chrome on on Windows prior to 154.0.8037.97 allowed a remote attacker leveraging social engineering to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)

CVSS v3
9.6
Vendor severity
HIGHper Google (Chromium)Vendor's own band, not a CVSS rating — advisory text: (Chromium security severity: High)
EG Score
9.6CRITICALhigh confidence
EG Risk
43
EG Risk 43/100CISA 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
Severity96% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* 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, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
9th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* 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, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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

October 2, 2026

Last Modified

October 3, 2026

Advisory Details (2)

Auto-updated Oct 3, 2026
No patch confirmed yet.
generic

Chromium

https://issues.chromium.org/issues/553114097
generic

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop.html

Vendor Advisories for CVE-2026-103626(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 15× in last 7d / 15× 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. 2026-10-04 13:39 UTCGHSA enrichment
  2. 2026-10-04 09:25 UTCGHSA enrichment
  3. 2026-10-04 05:10 UTCGHSA enrichment
  4. 2026-10-04 00:56 UTCGHSA enrichment
  5. 2026-10-03 20:42 UTCEG score recompute
  6. 2026-10-03 20:42 UTCGHSA enrichment
  7. 2026-10-03 16:23 UTCGHSA enrichment
  8. 2026-10-03 16:11 UTCEG score recompute▲ 0.80
  9. 2026-10-03 16:11 UTCGHSA enrichment
  10. 2026-10-03 16:09 UTCMITRE cvelistV5CVSS v3 → 9.6 · severity → CRITICAL
  11. 2026-10-03 14:25 UTCEPSS rescore
  12. 2026-10-03 06:39 UTCGHSA enrichment
  13. 2026-10-02 16:25 UTCNVD update
  14. 2026-10-02 16:13 UTCEG score recompute
  15. 2026-10-02 16:11 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-103626?
CVE-2026-103626 is a critical vulnerability published on October 2, 2026. Incorrect authorization in FileSystem in Google Chrome on on Windows prior to 154.0.8037.97 allowed a remote attacker leveraging social engineering to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)
When was CVE-2026-103626 disclosed?
CVE-2026-103626 was first published on October 2, 2026, with the most recent update on October 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-103626 actively exploited?
CVE-2026-103626 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (9th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-103626?
CVE-2026-103626 has a CVSS v3.1 base score of 9.6 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-103626?
No fix for CVE-2026-103626 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-2026-103626 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-103626

Explore →

Is Your Infrastructure Affected by CVE-2026-103626?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs