CVE-2026-27969 CRITICAL

CVE-2026-27969: Vitess users with backup storage access can write to arbitrary file paths on restore

Vendor Vitessio
Product vitess
Weakness CWE-22 · Path traversal
Published February 26, 2026
Last update February 26, 2026

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:L/SI:H/SA:H

What the vulnerability does

01Description

Vitess is a database clustering system for horizontal scaling of MySQL. Prior to versions 23.0.3 and 22.0.4, anyone with read/write access to the backup storage location (e.g. an S3 bucket) can manipulate backup manifest files so that files in the manifest — which may be files that they have also added to the manifest and backup contents — are written to any accessible location on restore. This is a common path traversal security issue. This can be used to provide that attacker with unintended/unauthorized access to the production deployment environment — allowing them to access information available in that environment as well as run any additional arbitrary commands there. Versions 23.0.3 and 22.0.4 contain a patch. No known workarounds are available.

Key dates

02Disclosure timeline

February 26, 2026 CVE published
February 26, 2026 Record updated