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Vulnerabilities

Vulnerability · CVE-2026-33638

Ech0 is an open-source, self-hosted publishing platform for personal idea sharing.

Published Mar 26, 2026 · catalog updated Jun 17, 2026 · Ech0 is an open-source,

Check if you run it

No confirmed exploitation is on record for CVE-2026-33638. EPSS is 0.61%. Act only if a listed version of Ech0 is an open-source, is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Ech0 is an open-source,).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.61%
Remediation
Advisory link
Affected products
cpe ech0/ech0

Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to version 4.2.0, is mounted as a public endpoint and returns user records without authentication. This allows remote unauthenticated user enumeration and exposure of user profile metadata. A fix is available in v4.2.0.

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.

  • cpe ech0/ech0version unspecified

How to fix CVE-2026-33638

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-2026-33638. EPSS is 0.61%. Act only if a listed version of Ech0 is an open-source, is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-862: Missing Authorization. EPSS 0.61%. 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. Mar 26, 2026 · NIST NVD

    Detected

    Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to version 4.2.0, is mounted as a public endpoint and returns user records without authentication. This allows remote unauthenticated user enumeration and exposure of user profile metadata. A fix is available in v4.2.0.

  2. Jun 17, 2026 · NIST NVD

    Updated

    Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to version 4.2.0, is mounted as a public endpoint and returns user records without authentication. This allows remote unauthenticated user enumeration and exposure of user profile metadata. A fix is available in v4.2.0.

Sources

  • CVE.orgVulnerability recordCVE-2026-33638

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-33638

    30-day exploitation probability 0.6%

    first.org
  • NIST NVDVulnerability recordCVE-2026-33638

    Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to version 4.2.0, is mounted as a public endpoint and returns user records without authentication. This allows remote unauthenticated user enumeration and exposure of user

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.