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VulnerabilityPublished Updated

CVE-2026-118656: Golang github labstack echo.v2 · Echo is a Go web framework

Affects golang-github-labstack-echo.v2Source GCVE Database

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Authoritative record:CVE-2026-118656· Medium 6.1

Not known to be exploited · CVSS 6.1 Medium · fixed in 4.16.0 : update golang-github-labstack-echo.v2 when convenient.

Data as of 5 Nov 2026, 12:35 UTC

CVSS 3.1 base score
6.1Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (GitHub_M)CVSS 3.16.1
Patch
Available – fixed in 4.16.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10golang-github-labstack-echopkg:deb/ubuntu/golang-github-labstack-echo?arch=source&distro=stonkingOther threatsAffected
  • =4.12.0-1
Fixed in–
Ubuntu 26.04 LTSgolang-github-labstack-echopkg:deb/ubuntu/golang-github-labstack-echo?arch=source&distro=resoluteOther threatsAffected
  • =4.12.0-1
Fixed in–
Ubuntu 24.04 LTSgolang-github-labstack-echopkg:deb/ubuntu/golang-github-labstack-echo?arch=source&distro=nobleOther threatsAffected
  • =4.11.1-2
Fixed in–
Ubuntu 22.04 LTSgolang-github-labstack-echopkg:deb/ubuntu/golang-github-labstack-echo?arch=source&distro=jammyOther threatsAffected
  • =4.2.1-2
Fixed in–
Ubuntu 22.04 LTSgolang-github-labstack-echo.v2pkg:deb/ubuntu/golang-github-labstack-echo.v2?arch=source&distro=jammyOther threatsAffected
  • =2.2.0-2
Fixed in–
Ubuntu 22.04 LTSgolang-github-labstack-echo.v3pkg:deb/ubuntu/golang-github-labstack-echo.v3?arch=source&distro=jammyOther threatsAffected
  • =3.3.10-1
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

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.

References

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