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-2026-61548 Rsyslog: mmpstrucdata stack buffer overflow with oversized RFC5424 structured data

Rsyslog is a rocket-fast system for log processing. From 7.5.4 until 8.2606.0, the optional mmpstrucdata plugin's parseSDPARAM function in plugins/mmpstrucdata/mmpstrucdata.c stores RFC5424 parameter values in a fixed pVal32 1024 stack buffer and calls parsePARAMVALUE without supplying the...

CVE-2026-61548

Rsyslog (a log processing system) versions 7.5.4 through 8.2606.0 contain a stack buffer overflow in the optional mmpstrucdata plugin. The parseSD_PARAM function stores RFC5424 parameter values in a fixed 32 KB stack buffer and calls parsePARAM_VALUE without supplying the destination size. A remo...

EUVD-2026-83185

Rsyslog is a rocket-fast system for log processing. From 7.5.4 until 8.2606.0, the optional mmpstrucdata plugin's parseSDPARAM function in plugins/mmpstrucdata/mmpstrucdata.c stores RFC5424 parameter values in a fixed pVal32 1024 stack buffer and calls parsePARAMVALUE without supplying the...

CVE-2026-61548 Rsyslog: mmpstrucdata stack buffer overflow with oversized RFC5424 structured data

Rsyslog is a rocket-fast system for log processing. From 7.5.4 until 8.2606.0, the optional mmpstrucdata plugin's parseSDPARAM function in plugins/mmpstrucdata/mmpstrucdata.c stores RFC5424 parameter values in a fixed pVal32 1024 stack buffer and calls parsePARAMVALUE without supplying the...

CVE-2026-61548 Rsyslog: mmpstrucdata stack buffer overflow with oversized RFC5424 structured data

Rsyslog is a rocket-fast system for log processing. From 7.5.4 until 8.2606.0, the optional mmpstrucdata plugin's parseSDPARAM function in plugins/mmpstrucdata/mmpstrucdata.c stores RFC5424 parameter values in a fixed pVal32 1024 stack buffer and calls parsePARAMVALUE without supplying the...

CVE-2026-61548

Rsyslog is a rocket-fast system for log processing. From 7.5.4 until 8.2606.0, the optional mmpstrucdata plugin's parseSDPARAM function in plugins/mmpstrucdata/mmpstrucdata.c stores RFC5424 parameter values in a fixed pVal32 1024 stack buffer and calls parsePARAMVALUE without supplying the...

CVE-2026-61548

Rsyslog is a rocket-fast system for log processing. From 7.5.4 until 8.2606.0, the optional mmpstrucdata plugin's parseSDPARAM function in plugins/mmpstrucdata/mmpstrucdata.c stores RFC5424 parameter values in a fixed pVal32 1024 stack buffer and calls parsePARAMVALUE without supplying the...

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...

EUVD-2026-83184

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: 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 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 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: 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: Heap-based Buffer Overflow

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...

PT-2026-102716

Rsyslog is a rocket-fast system for log processing. From 8.2110.0 until 8.2604.0, the optional imhttp module's parse auth header 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 passe...

CVE-2026-61548: Stack-based Buffer Overflow

Rsyslog is a rocket-fast system for log processing. From 7.5.4 until 8.2606.0, the optional mmpstrucdata plugin's parseSDPARAM function in plugins/mmpstrucdata/mmpstrucdata.c stores RFC5424 parameter values in a fixed pVal32 1024 stack buffer and calls parsePARAMVALUE without supplying the...

MiracleLinux 9 : rsyslog-8.2510.0-2.el9_8.1 (AXSA:2026-1860:02)

The remote MiracleLinux 9 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2026-1860:02 advisory. rsyslog: A configuration-dependent issue in rsyslog's optional imptcp input module can allow an unauthenticated remote peer to crash rsyslogd CVE-2026-19654...

RLSA-2026:67584 Moderate: rsyslog security update

The rsyslog packages provide an enhanced, multi-threaded syslog daemon. It supports MySQL, syslog/TCP, RFC 3195, permitted sender lists, filtering on any message part, and fine-grained control over output format. Security Fixes: rsyslog: A configuration-dependent issue in rsyslog's optional imptc...