CVE-2026-55556

Rsyslog is a rocket-fast system for log processing. From 8.2110.0 until 8.2604.0, the optional imhttp module's parseauthheader function in contrib/imhttp/imhttp.c allocates a zero-byte heap buffer with calloc0, len when an HTTP Basic Authorization value exceeds its fixed work buffer, then passes...

CVE-2026-55556

Rsyslog versions 8.2110.0 through 8.2604.0 are affected by a heap buffer overflow in the optional imhttp module's parse_auth_header function (contrib/imhttp/imhttp.c). When an HTTP Basic Authorization value exceeds the fixed work buffer, calloc(0, len) allocates a zero-byte heap buffer that is th...

CVE-2026-55556 Rsyslog: Heap buffer overflow in imhttp plugin Basic Authentication handling

Rsyslog is a rocket-fast system for log processing. From 8.2110.0 until 8.2604.0, the optional imhttp module's parseauthheader function in contrib/imhttp/imhttp.c allocates a zero-byte heap buffer with calloc0, len when an HTTP Basic Authorization value exceeds its fixed work buffer, then passes...

CVE-2026-55556

Rsyslog is a rocket-fast system for log processing. From 8.2110.0 unti...