{
  "affected": [
    {
      "affectedData": [
        {
          "product": "vitess",
          "vendor": "vitessio",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 24.0.2"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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"
    }
  ],
  "id": "CVE-2026-65959",
  "lastModified": "2026-08-18T19:17:00.223",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-65959",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-18T18:40:57.573817Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-18T19:17:00.223",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/vitessio/vitess/commit/4c58cd70edc6b03d61cb65842c342ac08341e64f"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/vitessio/vitess/commit/657662e78bde1c82df680e9cc43a686d619f8094"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/vitessio/vitess/commit/d929225a450027406687d27af8dca45620945ceb"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/vitessio/vitess/security/advisories/GHSA-mhc4-g3wh-cw7m"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/vitessio/vitess/security/advisories/GHSA-mhc4-g3wh-cw7m"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "vitess.io/vitess"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.24.0-rc1"
            },
            {
              "last_affected": "0.24.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "vitess.io/vitess"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.23.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-65959"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-18T20:50:54Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## Vulnerability Details\n\n**File**: `go/vt/vttablet/tabletmanager/vreplication/vrlog.go`\n\n### Summary\n`vttablet`\u0027s `/debug/vrlog` HTTP endpoint streams live VReplication event data \u2014 including the literal SQL DML statements being replicated by MoveTables, Reshard, Materialize, and \"vitess\"-strategy Online DDL workflows \u2014 with no authorization check at all. Every comparable \"debugging\" HTTP endpoint in vttablet/vtgate (querylogz, queryz, txlogz, livequeryz, schemaz, debugenv, hotrows, tablet_plans, query_stats, query_rules) calls `acl.CheckAccessHTTP(r, acl.DEBUGGING)` before serving data, so that the cluster operator\u0027s configured `--security-policy` (e.g. `deny-all`, `read-only`, or a custom plugin) is actually honored. `vrlog.go` is the one exception: it has zero references to the `acl` package.\n\n### Root Cause\n`addHttpEndpoint()` registers `/debug/vrlog` via `servenv.HTTPHandleFunc`, and `vrlogStatsHandler()` immediately starts streaming subscribed `VrLogStats` events to the response writer without first calling `acl.CheckAccessHTTP(r, acl.DEBUGGING)`, unlike every sibling handler in the same family (see e.g. `go/vt/vttablet/tabletserver/querylogz.go`\u0027s `querylogzHandler`, which calls the check first).\n\nThe data streamed is sensitive: `go/vt/vttablet/tabletmanager/vreplication/vplayer.go` calls `NewVrLogStats(...).Send(sql)` / `.Send(event.Statement)` for every row change and statement event flowing through a VReplication stream (vplayer.go:339, 700, 771, 785) \u2014 i.e. the literal SQL (including bound data values) being copied/replicated by MoveTables, Reshard, Materialize, and Online DDL.\n\n### Attack Scenario\n1. A cluster operator configures `--security-policy=deny-all` (or `read-only`, or a custom policy) specifically to lock down debugging/admin HTTP endpoints on vttablet, relying on this being uniformly enforced.\n2. An attacker who can reach the vttablet debug HTTP port (common in Kubernetes/Prometheus-scraping deployments where this port is exposed beyond localhost) \u2014 but who does NOT have the `DEBUGGING`/admin role the policy requires \u2014 sends `GET /debug/vrlog`.\n3. Every other debug endpoint correctly returns `403 Forbidden`. `/debug/vrlog` returns `200 OK` and streams live VReplication event data, including raw SQL DML statements containing application data values, for as long as the attacker keeps the connection open (bounded by `timeout`/`limit` query params, repeatable).\n\n### Impact\nConfidentiality impact: disclosure of live replicated application data (potentially including PII or other sensitive column values) to an unauthorized actor, bypassing an access control the operator explicitly configured. No write/modify capability; this is a read-only information-disclosure / access-control-bypass issue, scoped to the vttablet debug HTTP listener.\n\n### Vulnerable Code\n```go\n// go/vt/vttablet/tabletmanager/vreplication/vrlog.go\nfunc addHttpEndpoint() {\n\tservenv.HTTPHandleFunc(\"/debug/vrlog\", func(w http.ResponseWriter, r *http.Request) {\n\t\tch := vrLogStatsLogger.Subscribe(\"vrlogstats\")\n\t\tdefer vrLogStatsLogger.Unsubscribe(ch)\n\t\tvrlogStatsHandler(ch, w, r)\n\t})\n}\n\nfunc vrlogStatsHandler(ch chan *VrLogStats, w http.ResponseWriter, r *http.Request) {\n\ttimeout, limit := parseTimeoutLimitParams(r)\n\t// no acl.CheckAccessHTTP(r, acl.DEBUGGING) call anywhere in this file\n\t...\n```\n\n### Recommended Fix\n```go\nimport \"vitess.io/vitess/go/acl\"\n\nfunc vrlogStatsHandler(ch chan *VrLogStats, w http.ResponseWriter, r *http.Request) {\n\tif err := acl.CheckAccessHTTP(r, acl.DEBUGGING); err != nil {\n\t\tacl.SendError(w, err)\n\t\treturn\n\t}\n\ttimeout, limit := parseTimeoutLimitParams(r)\n\t...\n```\nThis mirrors the exact pattern already used by `querylogz.go`, `queryz.go`, `txlogz.go`, `livequeryz.go`, `schemaz.go`, `debugenv.go`, and `tx_serializer.go` (hotrows) in the same codebase.\n\n### Verification\nBuilt v24.0.1 from source and wrote a standalone Go test that: (1) activates the real `deny-all` security policy via `acl.RegisterFlags`, (2) registers `/debug/vrlog` via the real, unmodified `vreplication.NewVrLogStats(...)` call path (the same one `vplayer.go` uses for live replication traffic), (3) serves the real `servenv` HTTP mux on a loopback listener, and (4) issues a real `GET /debug/vrlog` while emitting a simulated replicated statement.\n\nResult:\n```\nacl.CheckAccessHTTP(DEBUGGING) under deny-all =\u003e err=not allowed: deny-all security-policy enforced\nGET /debug/vrlog under deny-all =\u003e status=200 body=\"ROWCHANGE Event\\tINSERT INTO secret_table (ssn) VALUES (\u0027leaked-via-vrlog\u0027)\\t2026-06-22T11:01:55\\t147101\\n\"\n```\nThe identical ACL check that protects every sibling endpoint correctly rejected the request, while `/debug/vrlog` returned 200 and streamed the simulated sensitive content \u2014 confirming the bypass against real, unmodified v24.0.1 code.\n\nAlso confirmed via the GitHub Contents API that `vrlog.go` has zero references to the `acl` package on `main`, `release-23.0`, and `release-22.0` as well, so all currently supported release lines appear affected.",
  "id": "GHSA-mhc4-g3wh-cw7m",
  "modified": "2026-08-18T20:50:54Z",
  "published": "2026-08-18T20:50:54Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vitessio/vitess/security/advisories/GHSA-mhc4-g3wh-cw7m"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitessio/vitess/pull/20467"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitessio/vitess/commit/4c58cd70edc6b03d61cb65842c342ac08341e64f"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitessio/vitess/commit/657662e78bde1c82df680e9cc43a686d619f8094"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitessio/vitess/commit/d929225a450027406687d27af8dca45620945ceb"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/vitessio/vitess"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Vitess: Missing authorization on vttablet /debug/vrlog exposes live VReplication SQL data"
}

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-65959 Vitess: Missing authorization on vttablet /debug/vrlog exposes live VReplication SQL data - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-65959.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "Vitess: Missing authorization on vttablet /debug/vrlog exposes live VReplication SQL data",
    "tracking": {
      "current_release_date": "2026-08-20T21:59:42.000Z",
      "generator": {
        "date": "2026-08-21T01:08:20.732Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-65959",
      "initial_release_date": "2026-08-20T21:59:42.000Z",
      "revision_history": [
        {
          "date": "2026-08-20T21:59:42.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "azl3 vitess 0:19.0.4-12.azl3",
                "product": {
                  "name": "azl3 vitess 0:19.0.4-12.azl3",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "vitess"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 vitess 0:19.0.4-12.azl3 as a component of Azure Linux 3.0",
          "product_id": "17084-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17084"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-65959",
      "cwe": {
        "id": "CWE-862",
        "name": "Missing Authorization"
      },
      "notes": [
        {
          "category": "general",
          "text": "GitHub_M",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "known_affected": [
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-65959 Vitess: Missing authorization on vttablet /debug/vrlog exposes live VReplication SQL data - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-65959.json"
        }
      ],
      "remediations": [
        {
          "category": "none_available",
          "date": "2026-08-20T21:59:42.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-1"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 5.3,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "17084-1"
          ]
        }
      ],
      "title": "Vitess: Missing authorization on vttablet /debug/vrlog exposes live VReplication SQL data"
    }
  ]
}