CVE-2026-79665 json
Ech0 before 4.5.1 Authorization Bypass via Session Tokens
published 6mo ago modified 2mo ago also EUVD-2026-65449 , GHSA-hmmq-qh6g-6wgh
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository lin-snow/Ech0. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
Ech0 before 4.5.1 contains an authorization bypass vulnerability where session tokens skip scope validation in RequireScopes middleware, allowing logged-in non-admin users to access admin endpoints. Attackers can read system logs, visitor statistics, user emails, and subscribe to live WebSocket logs by sending authenticated session tokens to unprotected endpoints.
Patch / fix
- lin-snow Ech0 4.5.1
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Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 2mo ago
Exploit prediction
0.51% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-11).
Exploits and checks
- github.com https://github.com/lin-snow/Ech0/security/advisories/GHSA-hmmq-qh6g-6wgh referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- lin-snow Ech0
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
github.com
/lin-snow/Ech0/security/advisories/GHSA-hmmq-qh6g-6wgh
vendor-advisory, exploit, advisory
-
vulncheck.com
/advisories/ech0-before-authorization-bypass-via-session-tokens
third-party-advisory
Sources
- CVE List CVE-2026-79665
- NVD CVE-2026-79665
- Maintainer advisory GHSA-hmmq-qh6g-6wgh
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of lin-snow/Ech0 published their own advisory on GitHub. Reviewed sources take precedence over it.