---
id: CVE-2026-65959
title: Vitess is a database clustering system for horizontal scaling of MySQL
summary: >-
  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() wi…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-862
vendor: vitess
product: vitess.io/vitess
affected:
  - 'vitess.io/vitess >= 0.24.0-rc1, <= 0.24.2'
  - vitess.io/vitess <= 0.23.6
patched:
  - vitess.io/vitess 0.24.3
published: '2026-08-18'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T20:05:53.723'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-65959'
references:
  - url: >-
      https://github.com/vitessio/vitess/commit/4c58cd70edc6b03d61cb65842c342ac08341e64f
    label: security-advisories@github.com
  - url: >-
      https://github.com/vitessio/vitess/commit/657662e78bde1c82df680e9cc43a686d619f8094
    label: security-advisories@github.com
  - url: >-
      https://github.com/vitessio/vitess/commit/d929225a450027406687d27af8dca45620945ceb
    label: security-advisories@github.com
  - url: 'https://github.com/vitessio/vitess/security/advisories/GHSA-mhc4-g3wh-cw7m'
    label: security-advisories@github.com
  - url: 'https://github.com/vitessio/vitess/security/advisories/GHSA-mhc4-g3wh-cw7m'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-65959'
  - url: 'https://github.com/vitessio/vitess/pull/20467'
  - url: 'https://github.com/vitessio/vitess'
tags:
  - nvd
  - osv
  - go
epss: 0.00426
epssPercentile: 0.34262
aliases:
  - GHSA-mhc4-g3wh-cw7m
  - GO-2026-6356
ecosystem: go
ingestedAt: '2026-08-19T19:22:23.346Z'
---

## Overview

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

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-65959)

Affected packages:

- `vitess.io/vitess >= 0.24.0-rc1, <= 0.24.2`
- `vitess.io/vitess <= 0.23.6`

Patched in:

- `vitess.io/vitess 0.24.3`

Source: https://osv.dev/vulnerability/GHSA-mhc4-g3wh-cw7m