Fix CVE(s): CVE-2026-66032

{
  "id": "4af2951e873fbefc08ecad85cdfad3ba21e418626b7c1e5ed9c1a73d1de54785",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1787740667",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Fix CVE(s): CVE-2026-66032",
    "summary": "* SECURITY UPDATE: double free in sftp_open() lets a malicious SSH server corrupt the heap of an authenticated client opening an SFTP session - debian/patches/CVE-2026-66032.patch: set data to NULL after freeing the SSH_FXP_STATUS response buffer on the FX_OK path, so the if(badness) arm cannot free the same pointer a second time when the follow-up sftp_packet_require() for SSH_FXP_HANDLE fails, in sftp_open() in src/sftp.c - CVE-2026-66032",
    "evidence": "osv:CLSA-2026-1787740667",
    "products": [
      {
        "name": {
          "value": "libssh2-1",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.8.0-2.1+deb10u1+tuxcare.els3",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libssh2-1-dev",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.8.0-2.1+deb10u1+tuxcare.els3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1787740667",
      "aliases": [
        "CLSA-2026-1787740667"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.8.0-2.1+deb10u1+tuxcare.els3"
                }
              ]
            }
          ],
          "package": {
            "name": "libssh2-1",
            "purl": "pkg:deb/tuxcare/libssh2-1?distro=debian-10",
            "ecosystem": "TuxCare:Debian:10"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787740667.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.8.0-2.1+deb10u1+tuxcare.els3"
                }
              ]
            }
          ],
          "package": {
            "name": "libssh2-1-dev",
            "purl": "pkg:deb/tuxcare/libssh2-1-dev?distro=debian-10",
            "ecosystem": "TuxCare:Debian:10"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787740667.json"
          }
        }
      ],
      "modified": "2026-10-26T09:31:53.015543122Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-66032"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/debian10els/CLSA-2026-1787740667.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-66032"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-66032",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 448815,
  "published_at": "2026-08-26T10:38:04+00:00"
}