{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "37e54720779237897bc6887efac42fe138817897"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "37e54720779237897bc6887efac42fe138817897"
            }
          ],
          "repo": "https://github.com/openkermit/ckermit",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-c5px-7h4c-gj8p"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-122"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/129xxx/CVE-2026-129126.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "range": [
              {
                "fixed": "11.1.515"
              }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
          }
        ]
      },
      {
        "extracted_events": [
          {
            "range": [
              {
                "fixed": "11.1.515"
              }
            ],
            "source": "DESCRIPTION"
          }
        ]
      }
    ]
  },
  "details": "C-Kermit before 11.1.515 contains a heap buffer overflow vulnerability in putsrv() in ckcfns.c that allows malicious peers to write past the srvcmd buffer by sending crafted packets. Attackers can use Kermit repeat-count compression in server command, GET, or file-header packets to write attacker-chosen bytes beyond the heap buffer on servers or receiving instances.",
  "id": "CVE-2026-129126",
  "modified": "2026-11-14T02:30:18.511088364Z",
  "published": "2026-11-13T16:23:41.944Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/129xxx/CVE-2026-129126.json"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/OpenKermit/ckermit/blob/v11.0.514/ckcfns.c#L461"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OpenKermit/ckermit/commit/37e54720779237897bc6887efac42fe138817897"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/OpenKermit/ckermit/releases/tag/v11.1.515"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/OpenKermit/ckermit/security/advisories/GHSA-c5px-7h4c-gj8p"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-129126"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/c-kermit-before-11.1.515-heap-buffer-overflow-via-putsrv-packet-decoding"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "C-Kermit before 11.1.515 Heap Buffer Overflow via putsrv() Packet Decoding"
}