High [CVE-2026-39879] SQL Injection vulnerability leading to denial of service and data manipulation
This high-severity Red Hat Linux advisory covers CVE-2026-39879.
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Summary
Due to a missing sanitization call in `afsql_dd_run_query`, 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 A flaw was found in syslog-ng. An attacker on an adjacent network can exploit a missing sanitization call in the `afsql_dd_run_query` function, leading to a SQL injection vulnerability.
This vulnerability, when the SQL driver is manually configured, can result in a denial of service and allow for limited data manipulation from an untrusted source. Red Hat severity: Important — CVSS 7.1 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H).
Weakness: CWE-150.
- < 4.12
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
Mitigation checklist
- To mitigate this vulnerability, avoid manually configuring and enabling the syslog-ng SQL driver if it is not essential for your environment. If the SQL driver is required, restrict network access to the syslog-ng instance to trusted networks only, for example, by configuring firewall rules to limit connections to the syslog-ng port. Note that changes to network configurations or syslog-ng service settings may require a service reload or restart to take effect, which could temporarily interrupt logging services.
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
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