CVE-2026-27965
CRITICAL
GHSA-8g8j-r87h-p36x
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
3Description
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 arbitrary code is later executed when that backup is restored. 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. Some workarounds are available. Those who intended to use an external decompressor then can always specify that decompressor command in the `--external-decompressor` flag value for `vttablet` and `vtbackup`. That then overrides any value specified in the manifest file. Those who did not intend to use an external decompressor, nor an internal one, can specify a value such as `cat` or `tee` in the `--external-decompressor` flag value for `vttablet` and `vtbackup` to ensure that a harmless command is always used.
Analysis
Command injection in Vitess MySQL clustering system before 23.0.3/22.0.4. Users with read/write access to the backup store can achieve code execution. …
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Remediation
Within 24 hours: Audit all backup storage locations and verify access controls are properly restricted. Within 7 days: Apply vendor patches to upgrade Vitess to version 23.0.3 or 22.0.4 or later across all affected instances. …
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External POC / Exploit Code
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