CVE-2026-29861

Critical

Published: 10 April 2026

Published

10 April 2026

Modified

27 April 2026

KEV Added

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Patch

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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0032 23.5th percentile

Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2026-29861 is a critical-severity SQL Injection (CWE-89) vulnerability. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 23.5th 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-2026-29861, published on 2026-04-10, is a SQL injection vulnerability (CWE-89) affecting PHP-MYSQL-User-Login-System version 1.0. The flaw exists via the username parameter in the login.php file, allowing malicious SQL payloads to be injected and executed.

The vulnerability carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), making it exploitable over the network by unauthenticated attackers with low complexity and no user interaction. Successful exploitation enables high-impact compromise of confidentiality, integrity, and availability, such as unauthorized data access, modification, or deletion through arbitrary SQL command execution.

Mitigation details are available in the referenced advisory at https://github.com/amanyadav78/CVE-2026-29861.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-21386

Vulnerability details

PHP-MYSQL-User-Login-System v1.0 was discovered to contain a SQL injection vulnerability via the username parameter at login.php.

CWE(s): CWE-89

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

SQL injection in unauthenticated public-facing login.php page directly enables T1190 (Exploit Public-Facing Application) for initial access and arbitrary SQL execution impacting confidentiality/integrity/availability.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0