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CVE-2026-118656 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.1 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1	[email protected]
https://github.com/labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5af	[email protected]
https://github.com/labstack/echo/releases/tag/v4.16.0	[email protected]
https://github.com/labstack/echo/releases/tag/v5.4.0	[email protected]
https://github.com/labstack/echo/security/advisories/GHSA-v753-g4cw-jm48	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-601	URL Redirection to Untrusted Site ('Open Redirect')	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 29, 2026	CVE Modified	CISA-ADP
Oct 28, 2026	New CVE Received	[email protected]