Echo has Arbitrary Scheme Injection in WWWRedirect/NonWWWRedirect Middlewares via X-Forwarded-Proto

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

• CISA KEV Not listed.
• EPSS 0.0019, the 8th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 28 Oct 2026, 20:17 UTC Confirmed by the CVE List
2. 28 Oct 2026, 21:04 UTC Confirmed by GitHub Advisory Database
3. 28 Oct 2026, 21:16 UTC Confirmed by NVD
4. 31 Oct 2026, 13:32 UTC First seen by agentprime
5. 5 Nov 2026, 23:15 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-23wf-92cp-8pcj
• OSV: GHSA-23wf-92cp-8pcj
• github.com/labstack/echo/security/advisories/GHSA-23wf-92cp-8pcj
• github.com/labstack/echo/pull/2953
• github.com/labstack/echo/commit/ca4f38a474302aabee93c66bdd0052359882e181
• github.com/labstack/echo/commit/d1d8ad3f99dd9b80542cd0c357d56a8916c515df
• github.com/labstack/echo
• github.com/labstack/echo/releases/tag/v4.15.2
• github.com/labstack/echo/releases/tag/v5.1.1

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.