CVE-2026-118656
mediumEcho is a Go web framework.
Echo is a Go web framework. Prior to 4.16.0 and 5.4.0, sanitizeURI checks only the first two bytes of a redirect target before deciding whether it begins with an absolute-path separator pair. When AddTrailingSlash or RemoveTrailingSlash is configured with a redirect status, a slash, TAB, separator path form can evade the guard, be emitted in the Location header, and be normalized by a browser into an attacker-controlled host. This issue is fixed in 4.16.0 and 5.4.0.
CVSS
6.1
6.1 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Severity source: NVD CVSS v3.1 (security-advisories@github.com)
Timeline (UTC)
Published: 2026-10-28 21:16
Modified: 2026-10-28 21:16
NVD status: Received
Last synced 12 hours ago
Verified against the source API 2026-10-28 22:10 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1 security-advisories@github.com
- https://github.com/labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5af security-advisories@github.com
- https://github.com/labstack/echo/releases/tag/v4.16.0 security-advisories@github.com
- https://github.com/labstack/echo/releases/tag/v5.4.0 security-advisories@github.com
- https://github.com/labstack/echo/security/advisories/GHSA-v753-g4cw-jm48 security-advisories@github.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-28 22:10 UTC · record ↗