{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "7.2.14"
              },
              {
                "introduced": "8.0.0"
              },
              {
                "fixed": "8.0.10"
              },
              {
                "introduced": "8.1.0"
              },
              {
                "fixed": "8.1.9"
              },
              {
                "introduced": "9.0.0"
              },
              {
                "fixed": "9.0.5"
              },
              {
                "introduced": "9.1.0"
              },
              {
                "fixed": "9.1.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "introduced": "2b5c7a0dbd61fd4281ef6166b7d119ba7fe7368c"
            },
            {
              "introduced": "67c8683792fc9ab7e295f833478eca180c5e4691"
            },
            {
              "introduced": "5018b12b0de2d2322a1bbf6b041c43740587c0f2"
            },
            {
              "introduced": "c9e8005e9d0ec817e26c7db318861cb821409249"
            },
            {
              "fixed": "499cfb9431c7cebec4d91f81bb4932a742a8c8ae"
            },
            {
              "fixed": "23b3f6bb66c19502225a40e7aeec9e1be76456c1"
            },
            {
              "fixed": "a9245aaf3286dee1795763661f0da6886acd8ef4"
            },
            {
              "fixed": "a253513ac7ff5790ca119053f3c7fbca4fdaad44"
            },
            {
              "fixed": "d27f9ba65a04e80d9c417112a7621fc98a56f70d"
            },
            {
              "fixed": "06bc7768fe609f2054e69ccedefe7628f5675da9"
            },
            {
              "fixed": "509cb3c74e8cbc9c0498ebe8b6c93dcd605e7271"
            },
            {
              "fixed": "98465eaffe3f95524a5046318bfbc4bdb9798291"
            },
            {
              "fixed": "e95911d4d65be8789fa3705f44d7ed1e65378445"
            },
            {
              "fixed": "f8d2027e8d4df790ac04974bf606408c8ea62778"
            }
          ],
          "repo": "https://github.com/valkey-io/valkey",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-mvcj-73cw-22m4"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-416"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63639.json"
  },
  "details": "Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's RESTORE command accepts a malformed RDB stream payload that assigns one Pending Entry List NACK to multiple consumers during stream consumer-group deserialization, causing a use-after-free when one consumer is deleted while another still references the shared NACK and potentially allowing remote code execution. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1.",
  "id": "CVE-2026-63639",
  "modified": "2026-08-21T03:30:12.671435563Z",
  "published": "2026-08-18T14:23:52.508Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/valkey-io/valkey/releases/tag/7.2.14"
    },
    {
      "type": "WEB",
      "url": "https://github.com/valkey-io/valkey/releases/tag/8.0.10"
    },
    {
      "type": "WEB",
      "url": "https://github.com/valkey-io/valkey/releases/tag/8.1.9"
    },
    {
      "type": "WEB",
      "url": "https://github.com/valkey-io/valkey/releases/tag/9.0.5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/valkey-io/valkey/releases/tag/9.1.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63639.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/valkey-io/valkey/security/advisories/GHSA-mvcj-73cw-22m4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63639"
    },
    {
      "type": "FIX",
      "url": "https://github.com/valkey-io/valkey/commit/06bc7768fe609f2054e69ccedefe7628f5675da9"
    },
    {
      "type": "FIX",
      "url": "https://github.com/valkey-io/valkey/commit/509cb3c74e8cbc9c0498ebe8b6c93dcd605e7271"
    },
    {
      "type": "FIX",
      "url": "https://github.com/valkey-io/valkey/commit/98465eaffe3f95524a5046318bfbc4bdb9798291"
    },
    {
      "type": "FIX",
      "url": "https://github.com/valkey-io/valkey/commit/e95911d4d65be8789fa3705f44d7ed1e65378445"
    },
    {
      "type": "FIX",
      "url": "https://github.com/valkey-io/valkey/commit/f8d2027e8d4df790ac04974bf606408c8ea62778"
    },
    {
      "type": "FIX",
      "url": "https://github.com/valkey-io/valkey/pull/4073"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Valkey: UAF in stream deserialization may lead to remote code execution"
}