CVE-2026-39879 SQL injection in syslog-ng SQL destionation driver
Attackers can inject SQL commands via untrusted sources in syslog-ng's SQL destination driver, requiring manual configuration to exploit.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-39879?
CVE-2026-39879 is a high-severity SQL injection vulnerability in syslog-ng, published on 20 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Due to a missing sanitization call in [`afsql_dd_run_query`](https://github.com/syslog-ng/syslog-ng/blob/649e6e18e3459fb4467000a88dfb12fa97f9719c/modules/afsql/afsql.c#L219), syslog-ng before 4.12 are vulnerable to SQL injection from an untrusted source. This is not part of the default configuration, the SQL driver has to be manually configured.
Fixes are in syslog-ng 4.12, syslog-ng Premium Edition 8.2 and syslog-ng Store Box 7.8
Weakness: CWE-150
Which versions are affected by CVE-2026-39879?
How do I fix CVE-2026-39879?
Upgrade to a fixed version.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-39879 being exploited?
There is no known exploitation of CVE-2026-39879 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-39879, DEBIAN-CVE-2026-39879, GHSA-qwf9-6222-m24m, UBUNTU-CVE-2026-39879.