HOMEVULNERABILITIESCVE-2026-33638
MEDIUM

CVE-2026-33638

CWE-862Published: March 26, 2026· Updated: Mar 31, 2026

5.3
CVSS v3.1
EPSS:0.06%probability of exploitation in 30 daysPercentile:19.3th

Official Description

Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to version 4.2.0, `GET /api/allusers` 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.

NVD Source

Technical Analysis

CVE-2026-33638 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected Vendors & Products

ech01 product
ech0
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/lin-snow/Ech0/commit/acbf1fd71011e6b9e1e6a911128056a19862f681
ADVISORYhttps://github.com/lin-snow/Ech0/security/advisories/GHSA-m983-7426-5hrj

All References (3)

→
https://github.com/lin-snow/Ech0/commit/acbf1fd71011e6b9e1e6a911128056a19862f681Patch
→
https://github.com/lin-snow/Ech0/releases/tag/v4.2.0Product · Release Notes
→
https://github.com/lin-snow/Ech0/security/advisories/GHSA-m983-7426-5hrjVendor Advisory

Quick Facts

CVE IDCVE-2026-33638
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-862
CISA KEVNo
EPSS (30d)0.06%
Affected1 vendor
PublishedMar 26, 2026

Related CVEs (CWE-862)

CVE-2025-30416
10.0
CVE-2026-0092
10.0
CVE-2026-2031
10.0
CVE-2026-33712
10.0
CVE-2026-34976
10.0
CVE-2026-44442
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-33638 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2026-33638·NVD