CVE-2026-78002 — Rsyslog: rsyslog: denial of service via heap buffer overflow in rainerscript replace() function
A flaw was found in rsyslog. An unauthenticated remote attacker can trigger a heap buffer overflow in the RainerScript `replace()` function by sending specially crafted syslog m…
Published: 2026-08-27 · CVSS: 7.5 · CVSS 3.1
A flaw was found in rsyslog. An unauthenticated remote attacker can trigger a heap buffer overflow in the RainerScript `replace()` function by sending specially crafted syslog messages. This vulnerability arises from an incorrect buffer size calculation during string replacement, causing memory corruption. Successful exploitation can lead to a denial of service (DoS) for the affected system.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7