Vulnerability from bitnami_vulndb
Published
2026-05-07 11:51
Modified
2026-05-07 12:11
Summary
redis-server Lua use-after-free may allow remote code execution
Details

Redis is an in-memory data structure store. In all versions of redis-server with Lua scripting, an authenticated attacker can exploit the master-replica synchronization mechanism to trigger a use-after-free on replicas where replica-read-only is disabled or can be disabled, which may lead to remote code execution. A workaround is to prevent users from executing Lua scripts or avoid using replicas where replica-read-only is disabled. This is patched in version 8.6.3.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "valkey",
        "purl": "pkg:bitnami/valkey"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.13"
            },
            {
              "introduced": "8.0.0"
            },
            {
              "fixed": "8.0.8"
            },
            {
              "introduced": "8.1.0"
            },
            {
              "fixed": "8.1.7"
            },
            {
              "introduced": "9.0.0"
            },
            {
              "fixed": "9.0.4"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "type": "CVSS_V4"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-23631"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:valkey-io:valkey:*:*:*:*:*:*:*:*"
    ],
    "severity": "Medium"
  },
  "details": "Redis is an in-memory data structure store. In all versions of redis-server with Lua scripting, an authenticated attacker can exploit the master-replica synchronization mechanism to trigger a use-after-free on replicas where replica-read-only is disabled or can be disabled, which may lead to remote code execution. A workaround is to prevent users from executing Lua scripts or avoid using replicas where replica-read-only is disabled. This is patched in version 8.6.3.",
  "id": "BIT-valkey-2026-23631",
  "modified": "2026-05-07T12:11:36.665Z",
  "published": "2026-05-07T11:51:58.626Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/redis/redis/releases/tag/8.6.3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/redis/redis/security/advisories/GHSA-8ghh-qpmp-7826"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23631"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "redis-server Lua use-after-free may allow remote code execution"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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