Vulnerability Description
Ech0 through 4.5.6 registers the PUT /api/echo/like/:id endpoint on the public router group without authentication or rate limiting. Unauthenticated attackers can increment the fav_count counter of any echo (including private echoes) by supplying its UUID, which can be harvested from the public GET /api/echo/page feed. Repeated requests are accepted without deduplication, each triggering a database write and a four-key cache invalidation, allowing attackers to inflate popularity metrics and amplify load on the database and cache. Fixed in 4.7.3.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/lin-snow/Ech0/security/advisories/GHSA-pj6q-4vq4-r8cg
- https://www.vulncheck.com/advisories/ech0-before-unauthenticated-fav-count-modif
- https://github.com/lin-snow/Ech0/security/advisories/GHSA-pj6q-4vq4-r8cg
FAQ
What is CVE-2026-79661?
CVE-2026-79661 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Ech0 through 4.5.6 registers the PUT /api/echo/like/:id endpoint on the public router group without authentication or rate limiting. Unauthenticated attackers can increment the fav_count counter of an...
How severe is CVE-2026-79661?
CVE-2026-79661 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-79661?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.