CVE-2026-79669 json
Ech0 before 4.4.3 Missing Authorization on System Logs
published 2026-04-10 6 mo ago modified 2026-09-23 46 d ago also GHSA-w8jj-cwmc-wgq2 , GO-2026-5701 , EUVD-2026-65445
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 20%
- public exploits
- 0
- none known
Summary
Ech0 before 4.4.3 lacks authorization checks on system log endpoints allowing any authenticated non-admin user to read and stream all server logs. Attackers can access historical logs and real-time log streams via GET /api/system/logs, GET /api/system/logs/stream, and WS /ws/system/logs to gather reconnaissance data including internal file paths, error stack traces, and application state.
Patch / fix
- go github.com/lin-snow/ech0 4.4.3
- lin-snow Ech0 4.4.3
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/lin-snow/Ech0/security/advisories/GHSA-w8jj-cwmc-wgq2 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/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 |
| GitHub | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/lin-snow/ech0 | <4.4.3 all versions |
4.4.3 |
Affected products
- lin-snow Ech0
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
github.com
/lin-snow/Ech0/security/advisories/GHSA-w8jj-cwmc-wgq2
vendor-advisory, exploit, web, advisory
-
vulncheck.com
/advisories/ech0-before-missing-authorization-on-system-logs
third-party-advisory
-
github.com
/lin-snow/Ech0
package
-
github.com
/lin-snow/Ech0/releases/tag/v4.4.3
web
Sources
- CVE List CVE-2026-79669
- GitHub Advisory GHSA-w8jj-cwmc-wgq2
- NVD CVE-2026-79669
- OSV GO-2026-5701
Fencer Vulns 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.