CVE-2026-55677 | Echo is a Go web framework. Prior to 4.15.3 and 5.2.0, Echo'… | CVSS 7.5 HIGH

Description

Echo is a Go web framework. Prior to 4.15.3 and 5.2.0, Echo's router and static file handler disagree on URL path decoding. The router matches routes using the raw encoded path (preserving %2F as-is), while StaticDirectoryHandler unescapes %2F to / before resolving filesystem paths. This allows an attacker to bypass route-level access controls and read static files without authorization. This vulnerability is fixed in 4.15.3 and 5.2.0.

Metadata

CVE ID: CVE-2026-55677
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-06-17 00:05 UTC
Published: 2026-06-26 16:15 UTC
Last updated: 2026-06-26 16:50 UTC
Primary CWE: CWE-22
CWE-22: Improper Limitation of a Pathname to a Restricted Di…
Vendor / Product: labstack / echo
Sources: cve.org · NVD

Severity & Metrics

7.5 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
labstack	echo	—	< 4.15.3, >= 5.0.0, < 5.2.0

Weakness (CWE)

CWE	Source	Description
CWE-22	cna	CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.5	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References (1)

https://github.com/labstack/echo/security/advisories/GHSA-vfp3-v2gw-7wfq https://github.com/labstack/echo/security/advisories/GHSA-vfp3-v2gw-7wfq