{"cve":"CVE-2026-79667","nvd":{"published":"2026-08-25T12:16:34.813","modified":"2026-08-31T20:50:15.927","status":"Deferred","description":"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_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N","score":7.2},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L","score":7.6},"cwes":["CWE-285"],"references":["https://github.com/lin-snow/Ech0/security/advisories/GHSA-4h9q-p5j4-xvvh","https://www.vulncheck.com/advisories/ech0-before-authentication-bypass-via-scope-enforcement","https://github.com/lin-snow/Ech0/security/advisories/GHSA-4h9q-p5j4-xvvh"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:17.453294893+00:00"},"epss":{"cve":"CVE-2026-79667","score":0.00322,"percentile":0.25251,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-4h9q-p5j4-xvvh","url":"https://osv.dev/vulnerability/GHSA-4h9q-p5j4-xvvh","summary":"Ech0: Scoped admin access tokens can bypass least-privilege controls on privileged endpoints, including backup export","modified":"2026-08-27T04:10:42.132264922Z","packages":[{"ecosystem":"Go","name":"github.com/lin-snow/ech0","purl":"pkg:golang/github.com/lin-snow/ech0","ranges":["<4.3.5"],"fixed":["4.3.5"]}]},{"id":"GO-2026-5123","url":"https://osv.dev/vulnerability/GO-2026-5123","summary":"Ech0: Scoped admin access tokens can bypass least-privilege controls on privileged endpoints, including backup export in github.com/lin-snow/ech0","modified":"2026-08-27T04:10:42.132264922Z","packages":[{"ecosystem":"Go","name":"github.com/lin-snow/ech0","purl":"pkg:golang/github.com/lin-snow/ech0","ranges":["all versions"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}