{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "anchor-lang"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.0.0-rc.1"
            },
            {
              "fixed": "1.0.0-rc.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0-rc.1"
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-13T15:33:46Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Impact\nAny uses of `InterfaceAccount` allows another unexpected account type to be passed, after https://github.com/solana-foundation/anchor/pull/3837 disabled discriminator checking for this type.\n\nThe bug was originally reported and fixed in https://github.com/solana-foundation/anchor/pull/4139, see that PR for more details.\n\n### Patches\nhttps://github.com/solana-foundation/anchor/pull/4139 patched the issue and was released in `1.0.0-rc.2`. Users should upgrade to the latest released version of Anchor 1.0.\n\n### References\nBug landed in: https://github.com/solana-foundation/anchor/pull/3837\nBug fixed in: https://github.com/solana-foundation/anchor/pull/4139",
  "id": "GHSA-429q-fhh4-r6hj",
  "modified": "2026-05-13T15:33:46Z",
  "published": "2026-05-13T15:33:46Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/solana-foundation/anchor/security/advisories/GHSA-429q-fhh4-r6hj"
    },
    {
      "type": "WEB",
      "url": "https://github.com/solana-foundation/anchor/pull/3837"
    },
    {
      "type": "WEB",
      "url": "https://github.com/solana-foundation/anchor/pull/4139"
    },
    {
      "type": "WEB",
      "url": "https://github.com/solana-foundation/anchor/commit/26ef36968a62e28a1f028e7adae4806af30c747d"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/solana-foundation/anchor"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Anchor: `InterfaceAccount` allows account substitution between unexpected types"
}