CVE-2026-22243
Published: 28 January 2026
Summary
CVE-2026-22243 is a high-severity SQL Injection (CWE-89) vulnerability in Egroupware Egroupware. Its CVSS base score is 8.7 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 27.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
EGroupware, a web-based groupware server written in PHP, contains a SQL injection vulnerability in its core components prior to versions 23.1.20260113 and 26.0.20260113. The issue resides specifically in the Nextmatch filter processing, where authenticated attackers can inject arbitrary SQL commands into the WHERE clause of database queries. This exploitation stems from a PHP type juggling weakness during JSON decoding, which converts numeric strings to integers and bypasses the application's is_int() security check.
Attackers with authenticated access (low privileges required) can exploit this vulnerability remotely over the network with low complexity and no user interaction. Successful exploitation grants high-impact confidentiality, integrity, and availability effects, as reflected in the CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), enabling potential data exfiltration, modification, or denial of service through crafted SQL payloads.
EGroupware has addressed the vulnerability in patches released for versions 23.1.20260113 and 26.0.20260113, available via GitHub release tags. The project's security advisory (GHSA-rvxj-7f72-mhrx) details the fix, recommending immediate upgrades for affected installations to mitigate the CWE-89 SQL injection risk.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-4883
Vulnerability details
EGroupware is a Web based groupware server written in PHP. A SQL Injection vulnerability exists in the core components of EGroupware prior to versions 23.1.20260113 and 26.0.20260113, specifically in the `Nextmatch` filter processing. The flaw allows authenticated attackers to inject…
more
arbitrary SQL commands into the `WHERE` clause of database queries. This is achieved by exploiting a PHP type juggling issue where JSON decoding converts numeric strings into integers, bypassing the `is_int()` security check used by the application. Versions 23.1.20260113 and 26.0.20260113 patch the vulnerability.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
SQL injection in publicly accessible web application (EGroupware) directly enables remote exploitation of a public-facing service for data exfiltration/modification/DoS.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly mitigates the CVE by requiring timely patching of the SQL injection flaw in EGroupware's Nextmatch filter processing to the fixed versions 23.1.20260113 or 26.0.20260113.
Prevents SQL injection exploitation by validating and sanitizing Nextmatch filter inputs, countering the PHP type juggling that bypasses the is_int() check.
Limits the impact of successful SQL injection by enforcing least privilege on the application's database account, reducing potential confidentiality, integrity, and availability damage from low-privilege authenticated attackers.