CVE-2020-36565

Directory traversal on Windows in github.com/labstack/echo/v4

5.3 MediumFix available

Due to improper sanitization of user input on Windows, the static file handler allows for directory traversal, allowing an attacker to read files outside of the target directory that the server has permission to read.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: None

Exploit likelihood

1.41%Up 0.5 points since Dec 8, 2022

What each source reports

NVD Score used 5.3

Record: CVE-2020-36565
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-22
Updated: 2026-11-02

CVE List 5.3

Directory traversal on Windows in github.com/labstack/echo/v4

Record: CVE-2020-36565
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

EUVDEUVD-2022-7655 5.3

Record: EUVD-2022-7655
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-j453-hm5x-c46w 5.3

Echo vulnerable to directory traversal

Record: GHSA-j453-hm5x-c46w
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-22
Updated: 2026-11-02

OSV 5.3

Record: CVE-2020-36565
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVGHSA-j453-hm5x-c46w 5.3

Echo vulnerable to directory traversal

Record: GHSA-j453-hm5x-c46w
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-22
Updated: 2026-11-02

OSVUBUNTU-CVE-2020-36565 5.3

Record: UBUNTU-CVE-2020-36565
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVGO-2021-0051 No score

Directory traversal on Windows in github.com/labstack/echo/v4

Record: GO-2021-0051
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`github.com/labstack/echo/v4` Go	before 4.2.0	4.2.0
`github.com/labstack/echo/v4` Go	before 4.1.18-0.20201215153152-4422e3b66b9f	4.1.18-0.20201215153152-4422e3b66b9f
`golang-github-labstack-echo` Ubuntu:22.04:LTS	All versions, plus listed versions 4.2.1-2	None known
`golang-github-labstack-echo` Ubuntu:24.04:LTS	All versions, plus listed versions 4.11.1-2	None known
`golang-github-labstack-echo` Ubuntu:25.10	All versions, plus listed versions 4.12.0-1	None known
`golang-github-labstack-echo` Ubuntu:26.10	All versions, plus listed versions 4.12.0-1	None known
`golang-github-labstack-echo` Ubuntu:26.04:LTS	All versions, plus listed versions 4.12.0-1	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-36565 is a medium vulnerability (CVSS 5.3) in Github.com/labstack/echo/v4, published April 14, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.41%, the 72nd percentile. Fixed in github.com/labstack/echo/v4 4.2.0.