CVE-2026-79667

HIGHPre-NVD 7.67.6—
EchelonGraph scoreHIGH confidence

Score 7.6 from GitHub Security Advisory (severity: HIGH) published 2026-08-25. a secondary CVSS source baseline 7.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
7.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.6Exploit: Elevated riskExposed: 0

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

Ech0 version 4.3.4 and earlier fails to reliably enforce scoped access token (least-privilege) restrictions on several privileged admin routes. Multiple privileged endpoints (e.g., /api/inbox, /api/panel/comments, /api/backup/export) omit scope checks and authorize based only on the user's admin role, and the backup export handler discards token scope metadata entirely. An attacker holding a deliberately limited (low-scope) admin access token can reach broader privileged functionality than intended, including reading the inbox and exporting a full database backup ZIP archive. Fixed in 4.4.3.

CVSS v3
7.6
EG Score
7.6(high)
EG Risk
50(Track)
EG Risk 50/100SSVC: Track

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
Severity76% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

August 25, 2026

Last Modified

August 25, 2026

Advisory Details (2)

Auto-updated Aug 25, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Ech0 before 4.4.3 Authentication Bypass via Scope Enforcement | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ech0-before-authentication-bypass-via-scope-enforcement
github Patch Available🟡 PoC Available

Scoped admin access tokens can bypass least-privilege controls on privileged endpoints, including backup export · Advisory · lin-snow/Ech0 · GitHub

https://github.com/lin-snow/Ech0/security/advisories/GHSA-4h9q-p5j4-xvvh

Vendor Advisories for CVE-2026-79667(1)

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

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/lin-snow/ech0—4.3.5—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 21× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 22:25 UTCGHSA enrichment
  3. 2026-08-29 11:22 UTCGHSA enrichment
  4. 2026-08-29 00:17 UTCEG score recompute
  5. 2026-08-29 00:17 UTCGHSA enrichment
  6. 2026-08-28 21:42 UTCEPSS rescore
  7. 2026-08-28 08:37 UTCGHSA enrichment
  8. 2026-08-27 21:34 UTCGHSA enrichment
  9. 2026-08-27 10:32 UTCGHSA enrichment
  10. 2026-08-26 23:29 UTCEG score recompute
  11. 2026-08-26 23:29 UTCGHSA enrichment
  12. 2026-08-26 14:47 UTCEPSS rescore
  13. 2026-08-26 12:26 UTCGHSA enrichment
  14. 2026-08-26 01:23 UTCGHSA enrichment
  15. 2026-08-25 14:21 UTCEG score recompute
  16. 2026-08-25 14:21 UTCGHSA enrichment
  17. 2026-08-25 13:36 UTCEG score recompute
  18. 2026-08-25 13:36 UTCGHSA enrichment
  19. 2026-08-25 12:17 UTCEG score recompute
  20. 2026-08-25 11:42 UTCEG score recompute
  21. 2026-08-25 11:41 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-79667?
CVE-2026-79667 is a high vulnerability published on August 25, 2026. Ech0 version 4.3.4 and earlier fails to reliably enforce scoped access token (least-privilege) restrictions on several privileged admin routes. Multiple privileged endpoints (e.g., /api/inbox, /api/panel/comments, /api/backup/export) omit scope checks and authorize based only on the user's admin…
When was CVE-2026-79667 disclosed?
CVE-2026-79667 was first published in the National Vulnerability Database on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-79667 actively exploited?
CVE-2026-79667 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 91.3% of all scored CVEs.
What is the CVSS score of CVE-2026-79667?
CVE-2026-79667 has a CVSS v3 base score of 7.6 (NVD).
How do I remediate CVE-2026-79667?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-79667, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-79667

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