pgPointcloud through 1.2.5 heap out-of-bounds read via WKB deserialization

{
  "id": "262b5d74d1579de59b7c67e902b10bc0cb2bb6fbbec5d9b00f56e22a2cd2ab78",
  "url": "https://osv.dev/vulnerability/CVE-2026-100387",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "pgPointcloud through 1.2.5 heap out-of-bounds read via WKB deserialization",
    "summary": "pgPointcloud through 1.2.5 contains a heap out-of-bounds read vulnerability in dimensional patch WKB deserialization that allows authenticated database users to read adjacent heap memory. Attackers can supply crafted pcpatch values with attacker-controlled size fields to copy heap memory into stored patches for exfiltration or crash the PostgreSQL backend.",
    "evidence": "osv:CVE-2026-100387",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-100387",
      "aliases": [
        "CVE-2026-100387"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/pgpointcloud/pointcloud",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "b5db45acfbb26ab212dc8f7fa2a5449f5ba17377"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.2.5"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.2.5"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.2.5",
            "v1.2.4",
            "v1.2.3",
            "v1.2.2",
            "v1.2.1",
            "v1.2.0",
            "v1.1.0",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100387.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.978745697Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100387.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100387",
        "https://www.vulncheck.com/advisories/pgpointcloud-through-1.2.5-heap-out-of-bounds-read-via-wkb-deserialization",
        "https://github.com/pgpointcloud/pointcloud/issues/387",
        "https://github.com/pgpointcloud/pointcloud/pull/388",
        "https://github.com/pgpointcloud/pointcloud",
        "https://github.com/pgpointcloud/pointcloud/blob/v1.2.5/lib/pc_bytes.c#L1347-L1373"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-125"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100387.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-100387",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492414,
  "published_at": "2026-09-25T20:13:05.306+00:00"
}