Bug 2572085

Summary:	CVE-2026-93404 rsyslog: rsyslog omclickhouse SQL injection [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Rohit Keshri <rkeshri>
Component:	rsyslog	Assignee:	Attila Lakatos <alakatos>
Status:	NEW ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	rawhide	CC:	alakatos, rsroka, zfridric
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["17cb4466-023e-4693-bb71-4db49c495f74"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2569362

Description Rohit Keshri 2026-11-12 05:19:04 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

The built-in ClickHouse INSERT template used SQL escaping that did not
account for ClickHouse backslash escapes. A sender able to submit a log
message routed to an affected action could alter the SQL sent to ClickHouse.
Affected deployments use the built-in template or custom INSERT templates
with option.stdsql="on". The issue was introduced in rsyslog 8.1901.0;
affected builds precede the planned 2026-11-11 daily stable fix. In
8.1901.0 the built-in template lacked a required SQL mode, while custom
stdSQL templates were exposed. Later releases used the vulnerable built-in
stdSQL template