IP Spoofing Vulnerability in Echo Web Framework Affects Labstack
CVE-2026-118265

5.3MEDIUM

Key Information:

Vendor

Labstack

Status
Echo
Vendor
CVE Published:
28 October 2026

What is CVE-2026-118265?

The Echo web framework by Labstack has a vulnerability affecting versions 5.0.0 to 5.4.0, where the ExtractIPFromRealIPHeader function does not properly validate the X-Real-IP header. This flaw permits attackers to spoof their IP address, potentially compromising security mechanisms that rely on IP address validation, such as rate limiting and access controls. The vulnerability is addressed in version 5.4.1, which ensures that the server validates the network peer directly rather than trusting the client-supplied header.

Affected Version(s)

echo >= 5.0.0, < 5.4.1

References

https://github.com/labstack/echo/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/labstack/echo/commit/1855061e572ae9dab...
x_refsource_MISC
https://github.com/labstack/echo/releases/tag/v5.4.1
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.