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CVE record · CVE-2026-78002

Rsyslog: rsyslog: denial of service via heap buffer overflow in rainerscript replace() function

CVSS 7.5 HighEPSS 0.011 · 64th percentile

Published by the CVE Program (CNA: redhat) at 27 Aug 2026, 16:12 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 Package name: rsyslog https://access.redhat.com/downloads/content/package-browser/
  • unaffected 0:8.2510.0-5.el10_2.2 to before * rpm
Other versions: affected
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support Package name: rsyslog https://access.redhat.com/downloads/content/package-browser/
  • unaffected 0:8.2412.0-1.el10_0.2 to before * rpm
Other versions: affected
Red Hat Red Hat Enterprise Linux 8 Package name: rsyslog https://access.redhat.com/downloads/content/package-browser/
  • unaffected 0:8.2102.0-15.el8_10.3 to before * rpm
Other versions: affected
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Package name: rsyslog https://access.redhat.com/downloads/content/package-browser/
  • unaffected 0:8.1911.0-7.el8_4.5 to before * rpm
Other versions: affected
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Package name: rsyslog https://access.redhat.com/downloads/content/package-browser/
  • unaffected 0:8.1911.0-7.el8_4.5 to before * rpm
Other versions: affected
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Package name: rsyslog https://access.redhat.com/downloads/content/package-browser/
  • unaffected 0:8.2102.0-7.el8_6.2 to before * rpm
Other versions: affected
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Package name: rsyslog https://access.redhat.com/downloads/content/package-browser/
  • unaffected 0:8.2102.0-7.el8_6.2 to before * rpm
Other versions: affected
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Package name: rsyslog https://access.redhat.com/downloads/content/package-browser/
  • unaffected 0:8.2102.0-13.el8_8.1 to before * rpm
Other versions: affected
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Package name: rsyslog https://access.redhat.com/downloads/content/package-browser/
  • unaffected 0:8.2102.0-13.el8_8.1 to before * rpm
Other versions: affected
Red Hat Red Hat Enterprise Linux 9 Package name: rsyslog https://access.redhat.com/downloads/content/package-browser/
  • unaffected 0:8.2510.0-2.el9_8.2 to before * rpm
Other versions: affected
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Package name: rsyslog https://access.redhat.com/downloads/content/package-browser/
  • unaffected 0:8.2102.0-113.el9_2.3 to before * rpm
Other versions: affected
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Package name: rsyslog https://access.redhat.com/downloads/content/package-browser/
  • unaffected 0:8.2310.0-4.el9_4.2 to before * rpm
Other versions: affected
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Package name: rsyslog https://access.redhat.com/downloads/content/package-browser/
  • unaffected 0:8.2412.0-1.el9_6.2 to before * rpm
Other versions: affected
Red Hat Red Hat Update Infrastructure 5 Package name: rhui5/haproxy-rhel9 https://catalog.redhat.com/software/containers/
  • unaffected 1790241900 to before * rpm
Other versions: affected
Red Hat Red Hat Enterprise Linux 6 Package name: rsyslog https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: unaffected
Red Hat Red Hat Enterprise Linux 6 Package name: rsyslog7 https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: unaffected
Red Hat Red Hat Enterprise Linux 7 Package name: rsyslog https://access.redhat.com/downloads/content/package-browser/ No versions given Other versions: affected
Identifiers
CVE-2026-78002
CNA
redhat
Weakness (CWE)
CWE-131
Tags
Published
27 Aug 2026
Updated
5 Nov 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CNA (redhat)
  • CISA KEV Not listed.
  • EPSS 0.011, the 64th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 27 Aug 2026, 16:12 UTC Confirmed by the CVE List
  2. 27 Aug 2026, 17:20 UTC Confirmed by NVD

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.