Out-of-bounds Read in libplctag library

{
  "id": "d6be404e039dcb0e4598eb793648bed6ee79817632636fdc7145e44e0506c55c",
  "url": "https://osv.dev/vulnerability/CVE-2025-1399",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Out-of-bounds Read in libplctag library",
    "summary": "Out-of-bounds Read vulnerability in unpack_response (session.c) in libplctag from 2.0 through 2.6.3 allows Overread Buffers via network.",
    "evidence": "osv:CVE-2025-1399",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2025-1399",
      "aliases": [
        "CVE-2025-1399"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/libplctag/libplctag",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "c55bc5876d938dda1c609750cde5ae4812d7b8a8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2.0"
                      },
                      {
                        "last_affected": "2.6.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.6.3",
            "v2.6.2",
            "v2.6.1",
            "v2.6.0",
            "v2.5.6",
            "v2.5.5",
            "v2.5.4",
            "v2.5.3",
            "v2.5.2",
            "v2.5.1",
            "v2.5.0",
            "v2.4.12",
            "v2.4.11",
            "v2.4.10",
            "v2.4.9",
            "v2.4.8",
            "v2.4.7",
            "v2.4.6",
            "v2.4.5",
            "v2.4.4",
            "v2.4.3",
            "v2.4.2",
            "v2.4.1",
            "v2.3.7",
            "v2.3.6",
            "v2.3.5",
            "v2.3.4",
            "v2.3.3",
            "v2.3.2",
            "v2.3.0",
            "v2.2.1",
            "v2.2.0",
            "v2.1.22",
            "v2.1.21",
            "v2.1.19",
            "v2.1.17",
            "v2.1.16",
            "v2.1.15",
            "v2.1.11",
            "v2.1.9-pre",
            "v2.1.9",
            "v2.1.8",
            "v2.1.7",
            "v2.1.5",
            "v2.1.4",
            "v2.1.3",
            "v2.1.2",
            "v2.1.1",
            "v2.1.0",
            "v2.0.35",
            "v2.0.34",
            "v2.0.33",
            "v2.0.32",
            "v2.0.31",
            "v2.0.30",
            "v2.0.29",
            "v2.0.28",
            "v2.0.27",
            "v2.0.26",
            "v2.0.25",
            "v2.0.24",
            "v2.0.23",
            "v2.0.22",
            "v2.0.21",
            "v2.0.20",
            "v2.0.19",
            "v2.0.18",
            "v2.0.17",
            "v2.0.14",
            "v2.0.11",
            "v1.5.14",
            "2.0b1",
            "v1.5.13",
            "v1.5.11",
            "v1.5.10",
            "v1.5.8",
            "v1.5.9",
            "v1.5.7",
            "v1.5.6",
            "v1.5.5",
            "v1.5.4",
            "v1.5.3",
            "issue_45_crash_fix",
            "v1.5.2",
            "Issue_45_patch",
            "v1.5.1",
            "v1.5.0",
            "v1.0.45",
            "v1.5-beta.2",
            "v1.0.44",
            "v1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-1399.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.306583870Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/1xxx/CVE-2025-1399.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-1399",
        "https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-1399",
        "https://github.com/libplctag/libplctag"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-125"
        ],
        "cna_assigner": "Nozomi",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/1xxx/CVE-2025-1399.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-1399",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 522136,
  "published_at": "2025-05-07T07:04:10.708+00:00"
}