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Fencer Vulns
high 8.1

CVE-2026-92709 json

Rsyslog: DynFile Path Traversal → Arbitrary File Write as Root → RCE

published 2026-10-22 18 d ago modified 2026-10-29 11 d ago also EUVD-2026-108168

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

Rsyslog is a rocket-fast system for log processing. From versions 1.15.0 to 8.2610.0, rsyslog's omfile dynaFile facility intentionally allows templates to generate flexible output paths. This supports valid deployments that route logs into different directories or use dynamically generated file names. A deployment becomes unsafe when a dynaFile template uses a value influenced by untrusted input as a path component without explicit secure-path handling. In that configuration, the rendered path can escape the operator's intended log directory. This is not limited to the RFC5424 HOSTNAME field. Any untrusted value that reaches a dynaFile path component can create the condition. At time of publication, there are no publicly available patches.

Patch / fix

  • rsyslog SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 8.2306.0-150400.5.51.1
  • rsyslog SLE Module for Server Applications 15 SP7, SLE Module for Package Hub 15 SP7, SLE Module for Basesystem 15 SP7 8.2608.0-150700.3.29.1
  • rsyslog SLES for SAP 15 SP6, SLES 15 SP6-LTSS 8.2406.0-150600.12.30.1
  • rsyslog SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 8.2106.0-8.30.2

suse advisories SUSE-SU-2026:5122-1SUSE-SU-2026:5100-1SUSE-SU-2026:5089-1SUSE-SU-2026:5082-1

  • rsyslog openSUSE Leap 16.0 8.2608.0-160000.1.1
  • rsyslog openSUSE Tumbleweed 8.2608.0-4.1

opensuse advisories openSUSE-SU-2026:22184-1openSUSE-SU-2026:12349-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-92709 updated cvss 8.1

rsyslog: rsyslog: Path traversal via unsanitized dynaFile templates

  • Red Hat Enterprise Linux 6 rsyslog, rsyslog7, rsyslog-relp, rsyslog-snmp, rsyslog-mysql, rsyslog-pgsql, +10 more Red Hat Enterprise Linux 7 rsyslog, rsyslog-relp, rsyslog-snmp, rsyslog-kafka, rsyslog-mysql, rsyslog-pgsql, +12 more Red Hat Enterprise Linux 8 rsyslog, rsyslog-relp, rsyslog-snmp, rsyslog-kafka, rsyslog-mysql, rsyslog-pgsql, +14 more Red Hat Enterprise Linux 9 rsyslog, rsyslog-relp, rsyslog-snmp, rsyslog-kafka, rsyslog-mysql, rsyslog-pgsql, +15 more Red Hat Enterprise Linux 10 rsyslog 8.2604.0-5.el10
    affected: workaround, no fix available

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
11 d ago

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • rsyslog rsyslog

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory
  • CWE-73 External Control of File Name or Path

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.