CVE-2026-27965
Vitess backup manifest tampering can trigger code execution on restore
Is CVE-2026-27965 being exploited?
Not confirmed. CVE-2026-27965 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 0.42% probability of exploitation in the next 30 days.
How severe is CVE-2026-27965?
CVE-2026-27965 is rated High with a CVSS score of 8.4. 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-2026-27965?
Yes. A fix has been recorded for CVE-2026-27965. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-27965 affect?
CVE-2026-27965 affects Vitess, vtbackup, vttablet, backup storage (S3). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-27965?
Upgrade to 23.0.3 or 22.0.4; review backup manifest handling.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker with read/write access to backup storage can cause arbitrary code execution during restore and access production data.
Patch when possible
- affected< 22.0.4
- affected>= 23.0.0 and < 23.0.3
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.