Critical Alert 2 Active Exploits Detected Today

CVE-2026-56291 Balbooa Forms Unrestricted Upload of File with Dangerous Type Vulnerability →
CVE-2026-48939 iCagenda Unrestricted Upload of File with Dangerous Type Vulnerability →
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CVE-2026-6104NVD

Vulnerability Summary

In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, when an encoding name containing an embedded NUL byte is passed to mb_convert_encoding() or related mbstring functions, the code incorrectly assumes that when strncasecmp() returns 0 it means the strings have the same length. This can lead to out-of-bounds read of global memory, potentially causing a crash or information disclosure or crash. Affected functions include mb_convert_encoding(), mb_detect_encoding(), mb_convert_variables(), and mb_detect_order(), as well as the mbstring.detect_order and mbstring.http_output INI settings.
Severity Level
UNKNOWN
Published Date
May 10, 2026
Last Modified
May 11, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.03%Probability
Root Weakness (CWE)
N/A