🛡️ CVE-2026-55677 on Ubuntu — golang-github-labstack-echo

⚪ Unknown ✅ No Known Exploit OSV

N/A

CVSS Score

0 Low4 Medium7 High9 Critical10

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.

Distribution advisory

This page covers CVE-2026-55677 as tracked by Ubuntu, for the package golang-github-labstack-echo. No fixed version has been recorded for this distribution yet.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

UBUNTU-CVE-2026-55677 is classified as CWE-22: Path Traversal. A file path built from user input is not confined to the intended directory, letting an attacker reach files elsewhere on the filesystem.

Affected software

UBUNTU-CVE-2026-55677 is recorded against 3 packages.

golang-github-labstack-echo
golang-github-labstack-echo.v2
golang-github-labstack-echo.v3

Timeline and source

Published on 26 June 2026 and last revised on 29 June 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
www.cve.org (Report)
github.com (Report)

Details

Severity Unknown

CVSS Score N/A

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

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2026-06-26

Updated 2026-08-11

Modified 2026-06-29

Fix URL N/A

Affected Packages

Software	From version	Fixed in
golang-github-labstack-echo	—	—
golang-github-labstack-echo.v2	—	—
golang-github-labstack-echo.v3	—	—

References

REPORT https://ubuntu.com/security/CVE-2026-55677

REPORT https://www.cve.org/CVERecord?id=CVE-2026-55677

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

🔗 NVD 🔗 Mitre

Similar Threats

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