Affects widely used MariaDB server; allows authenticated crash and potential RCE—enterprise DB risk that should reach all IT/DBA teams.
CVE-2026-107815
Authenticated CONNECT engine bug in MariaDB allows crash and possible RCE via one-byte stack overwrite.
Is CVE-2026-107815 being exploited?
Not confirmed. CVE-2026-107815 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.57% probability of exploitation in the next 30 days.
How severe is CVE-2026-107815?
CVE-2026-107815 is rated High with a CVSS score of 8.5. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-107815?
Yes. A fix has been recorded for CVE-2026-107815. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-107815 affect?
CVE-2026-107815 affects MariaDB versions prior to fixes: 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2 (CONNECT engine enabled). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-107815?
Upgrade to the listed fixed MariaDB versions; disable CONNECT engine if immediate patching isn't possible.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated user using CONNECT can trigger a one-byte null write beyond a stack buffer, causing crash and possible remote code execution.
Immediate action required
- affected>= 10.6.1 and < 10.6.28
- affected>= 10.11.1 and < 10.11.19
- affected>= 11.4.1 and < 11.4.13
- affected>= 11.8.1 and < 11.8.9
- affected>= 12.3.1 and < 12.3.3
- affected>= 13.0.1 and < 13.0.2
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.