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Vulnerabilities

Vulnerability · CVE-2026-25766

Echo is a Go web framework.

Published Feb 19, 2026 · catalog updated Feb 19, 2026 · Echo

Last checked Nov 12, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-25766. EPSS is 0.38%. Act only if a listed version of Echo is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.38%
Remediation
Version ranges on file
Affected products
vendor labstack Echo 5.0.0, < 5.0.3

Echo is a Go web framework. In versions 5.0.0 through 5.0.2 on Windows, Echo’s using the default filesystem allows path traversal via backslashes, enabling unauthenticated remote file read outside the static root. In , the requested path is unescaped and normalized with (URL semantics). does not treat as a path separator, so sequences remain in the cleaned path. The resulting path is then passed to . When the filesystem is left at the default (nil), Echo uses which calls ( ). On Windows, treats as a path separator and resolves , allowing traversal outside the static root. Version 5.0.3 fixes t

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor labstack Echo 5.0.0, < 5.0.35.0.0, < 5.0.3

How to fix CVE-2026-25766

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-25766. EPSS is 0.38%. Act only if a listed version of Echo is installed.

Which versions are affected?

Compare what you have installed with labstack Echo 5.0.0, < 5.0.3 5.0.0, < 5.0.3. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.38%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 19, 2026 · EUVD

    Detected

    Echo is a Go web framework. In versions 5.0.0 through 5.0.2 on Windows, Echo’s using the default filesystem allows path traversal via backslashes, enabling unauthenticated remote file read outside the static root. In , the requested path is unescaped and normalized with (URL semantics). does not treat as a path separator, so sequences remain in the cleaned path. The resulting path is then passed t

  2. Feb 19, 2026 · EUVD

    Updated

    Echo is a Go web framework. In versions 5.0.0 through 5.0.2 on Windows, Echo’s using the default filesystem allows path traversal via backslashes, enabling unauthenticated remote file read outside the static root. In , the requested path is unescaped and normalized with (URL semantics). does not treat as a path separator, so sequences remain in the cleaned path. The resulting path is then passed t

Sources

  • CVE.orgVulnerability recordCVE-2026-25766

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-25766

    30-day exploitation probability 0.38%

    first.org
  • EUVDVulnerability recordEUVD-2026-8207

    Echo is a Go web framework. In versions 5.0.0 through 5.0.2 on Windows, Echo’s using the default filesystem allows path traversal via backslashes, enabling unauthenticated remote file read outside the static root. In , the requested path is unescaped and normalized with (URL sema

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 12, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 9, 2026
  • CVE.orgNov 9, 2026
  • EUVDNov 9, 2026