{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": [
              "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*",
              "cpe:2.3:a:discourse:discourse:2026.3.0:*:*:*:latest:*:*:*"
            ],
            "extracted_events": [
              {
                "introduced": "2026.1.0"
              },
              {
                "fixed": "2026.1.2"
              },
              {
                "introduced": "2026.2.0"
              },
              {
                "fixed": "2026.2.1"
              },
              {
                "introduced": "2026.3.0"
              },
              {
                "last_affected": "2026.3.0"
              }
            ],
            "source": [
              "CPE_RANGE",
              "CPE_STRING",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "322d3c0ac6a8f133b3f82875e9dbbe310f638c1b"
            },
            {
              "fixed": "808b2ac23d8ff421563b40203091026732471c60"
            },
            {
              "introduced": "f7cec86997edc21d6074ceb7666f7e2e6e1b1fdf"
            },
            {
              "fixed": "f38464e46df1b8c51f7d60826502476908d6bb2b"
            },
            {
              "introduced": "896e810e1b296478bba91559a8fc89a9926f11fe"
            },
            {
              "fixed": "84e5865a279716c6866e8c0648d1d8b42320603c"
            },
            {
              "fixed": "d25b8ee9ee182dbb34e92b34e39878ce4d59bcdc"
            },
            {
              "fixed": "d2f317271ad7638f1e2791905472ebd9370946d1"
            }
          ],
          "repo": "https://github.com/discourse/discourse",
          "type": "GIT"
        }
      ],
      "versions": [
        "2026.3.0",
        "= 2026.3.0-latest"
      ]
    }
  ],
  "aliases": [
    "GHSA-g4v5-6gfp-3hjq"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-200"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33355.json"
  },
  "details": "Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, the `/private-posts` endpoint did not apply post-type visibility filtering, allowing regular PM participants to see whisper posts in PM topics they had access to. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.",
  "id": "CVE-2026-33355",
  "modified": "2026-08-12T03:51:19.684137132Z",
  "published": "2026-03-19T22:01:42.387Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33355.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/discourse/discourse/security/advisories/GHSA-g4v5-6gfp-3hjq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33355"
    },
    {
      "type": "FIX",
      "url": "https://github.com/discourse/discourse/commit/84e5865a279716c6866e8c0648d1d8b42320603c"
    },
    {
      "type": "FIX",
      "url": "https://github.com/discourse/discourse/commit/d25b8ee9ee182dbb34e92b34e39878ce4d59bcdc"
    },
    {
      "type": "FIX",
      "url": "https://github.com/discourse/discourse/commit/d2f317271ad7638f1e2791905472ebd9370946d1"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Discourse filters whisper posts from private-posts feed"
}