CVE-2026-27969 Vitess users with backup storage access can write to arbitrary file paths on restore
Attackers with backup storage access can write arbitrary files during restore, leading to unauthorized access and command execution in the production environment.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-27969?
CVE-2026-27969 is a critical path traversal vulnerability in vitessio vitess, published on 26 Feb 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-27969?
5 open source packages ship an affected version, including vitess.io/vitess. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
vitess.io/vitess Go | All versions | 0.22.4, 0.23.3 |
vitess.io/vitess Go | All versions | 0.22.4 |
vitess.io/vitess Go | All versions | 0.22.4 |
vitess.io/vitess Go | From 0.23.0-rc1 | 0.23.3 |
vitess.io/vitess Go | From 0.23.0-rc1 | 0.23.3 |
Products include Linuxfoundation Vitess.
How do I fix CVE-2026-27969?
Upgrade vitess.io/vitess to a fixed version for your release line: 0.22.4 or 0.23.3.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-27969 being exploited?
There is no known exploitation of CVE-2026-27969 in the wild and no public exploit code.
Other vulnerabilities in vitessio vitess
- CVE-2026-104252 Vitess vttablet /twopcz reflected XSS
- CVE-2026-27965 Vitess users with backup storage access can gain unauthorized access to production deployment environments
- CVE-2023-29195 Vitess VTAdmin users that can create shards can deny access to other functions
- CVE-2023-29194 vitess allows users to create keyspaces that can deny access to already existing keyspaces
Sources
Also known as AZL-78359, AZL-78516, GHSA-r492-hjgh-c9gw, GO-2026-4570.