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Vulnerability details

CVE-2026-92709

rsyslog rsyslog

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

CVSS 3.1
8.1High

Official description

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.

CVSS scores

ScoreVersionSourceVector
8.1High 3.1 CVEProject cvelistV5 (CNA) (GitHub_M) CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

VendorProductVersionsSource
rsyslog rsyslog >= 1.15.0, <= 8.2610.0 CVEProject cvelistV5 (CNA)

References and advisories

1
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Details

Published
2026-10-22
Last updated
2026-10-29
State
Published
Assigner (CNA)
GitHub_M

Exploit prediction (EPSS)

0.37%
Probability of exploitation in 30 days
31.6%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
None
Technical impact
Total

Weaknesses (CWE)

  • CWE-22
    Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-73
    External Control of File Name or Path