Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Echo v5 versions from 5.0.0 before 5.4.0 and Echo v4 versions before 4.16.0 are affected. When MethodOverride is registered with e.Use() ahead of CSRF, a POST request can be rewritten to a safe method such as GET, which causes CSRF to skip token validation and lets state-changing POST handlers run without a CSRF check. Upgrade github.com/labstack/echo/v5 to 5.4.0 or github.com/labstack/echo/v4 to 4.16.0. As a workaround, register MethodOverride with e.Pre() or register CSRF before MethodOverride.
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 |
|---|---|---|---|---|
| 5.3 | Medium | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0016, the 5th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 28 Oct 2026, 19:21 UTC Confirmed by the CVE List
- 28 Oct 2026, 20:17 UTC Confirmed by NVD
- 31 Oct 2026, 14:11 UTC First seen by agentprime
- 31 Oct 2026, 14:11 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-r7w9-592q-9vg4
- OSV: GHSA-r7w9-592q-9vg4
- github.com/labstack/echo/security/advisories/GHSA-r7w9-592q-9vg4
- github.com/labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1
- github.com/labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5af
- github.com/labstack/echo
- github.com/labstack/echo/releases/tag/v4.16.0
- github.com/labstack/echo/releases/tag/v5.4.0