CVE-2026-61828
NixOS MySQL init allows local users to log in as root without password.
Is CVE-2026-61828 being exploited?
Not confirmed. CVE-2026-61828 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 0.15% probability of exploitation in the next 30 days.
How severe is CVE-2026-61828?
CVE-2026-61828 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-2026-61828?
Yes. A fix has been recorded for CVE-2026-61828. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-61828 affect?
CVE-2026-61828 affects NixOS Nixpkgs MySQL module, Services: mysql, percona-server, NixOS channels prior to 25.11 and 26.05. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-61828?
Upgrade NixOS channels to 25.11/26.05 or apply Nixpkgs fix and restart MySQL services.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local unprivileged processes can authenticate as MySQL root without a password, enabling local privilege escalation and full DB/host control.
Immediate action required
- affected< 25.11
- affected>= 26.05-beta and < 26.05
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.