CVE-2026-79661
Ech0 through 4.5.6 registers the PUT /api/echo/like/:id endpoint on the public router group without authentication or rate limiting. Unauthe
CVSS
6.5
Medium
EPSS
0.2%
p16
KEV
—
Exploit Today
5
0-100
Published: Aug 25, 2026 · Last modified: Aug 27, 2026 · CWE-770
Not enough EPSS history yet.
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.