Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The Go module github.com/lin-snow/ech0 before 1.4.8-0.20260401031029-4ca56fea5ba4 is vulnerable to server-side request forgery through the unauthenticated GET /api/website/title endpoint, which fetches any supplied URL without checking the target host or IP address. An anonymous attacker can use it to reach internal services, localhost-bound services, and cloud metadata endpoints, and can read part of the response through the extracted HTML title. Upgrade to 1.4.8-0.20260401031029-4ca56fea5ba4 or later.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.2 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0062, the 50th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:07 UTC First seen by agentprime
- 31 Oct 2026, 15:07 UTC Confirmed by OSV