# CVE-2026-78002

## Summary

- **CVE ID:** CVE-2026-78002
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-131
- **Published:** Aug 27, 2026
- **Last Modified:** Sep 4, 2026

## Description

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.

## Affected Products

No affected products listed.

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2026-78002)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2521135)
- [CNA](https://github.com/rsyslog/rsyslog/security/advisories/GHSA-g72f-gc6v-f2w3)
- [CVE](http://www.openwall.com/lists/oss-security/2026/08/29/1)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.61%
- **EPSS Percentile:** 47.4

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-12._