CVE-2026-4190
Published: 16 March 2026
Summary
CVE-2026-4190 is a medium-severity Injection (CWE-74) vulnerability in Hackmd (inferred from references). Its CVSS base score is 6.9 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 13.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2026-4190 is a SQL injection vulnerability in JawherKl node-api-postgres versions up to 2.5. The issue affects the User.getAll function in the models/user.js file, where manipulation of the 'sort' argument results in SQL injection. It is associated with CWEs CWE-74 and CWE-89.
The vulnerability enables remote exploitation by unauthenticated attackers with low attack complexity and no user interaction required, as indicated by its CVSS v3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L). Attackers can achieve low impacts on confidentiality, integrity, and availability through injected SQL queries.
Advisories note that the exploit is public and may be used, with references available on HackMD and VULDB. The vendor was contacted early about the disclosure but did not respond in any way, and no patches or mitigations are mentioned.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-12251
Vulnerability details
A vulnerability was detected in JawherKl node-api-postgres up to 2.5. This impacts the function User.getAll of the file models/user.js. The manipulation of the argument sort results in sql injection. The attack can be executed remotely. The exploit is now public…
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and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
SQL injection in public-facing Node/Postgres API (User.getAll via 'sort' param) directly enables remote unauthenticated exploitation of the web application.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly prevents SQL injection by validating and sanitizing the 'sort' argument in the User.getAll function before incorporation into database queries.
Ensures timely remediation of the SQL injection flaw in JawherKl node-api-postgres through patching, workarounds, or replacement despite vendor non-response.
Boundary protection mechanisms like web application firewalls inspect and block SQL injection payloads in the vulnerable 'sort' parameter.