{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "1.0.0"
              },
              {
                "fixed": "2.3.8"
              }
            ]
          },
          "events": [
            {
              "introduced": "d01709bf0100183045927c03b90db78fb8e40bda"
            },
            {
              "fixed": "dec3693cbb151b4686b0d926b95379c71f391b1a"
            }
          ],
          "repo": "https://github.com/himmelblau-idm/himmelblau",
          "type": "GIT"
        },
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "3.0.0-alpha"
              },
              {
                "fixed": "3.1.0"
              }
            ]
          },
          "events": [
            {
              "introduced": "cf9255c3ffea77705e9725b18f39d520b3b07f59"
            },
            {
              "fixed": "9079a98b44beb1c4e77215a262b95e6fd44c1dfb"
            }
          ],
          "repo": "https://github.com/himmelblau-idm/himmelblau",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-44wm-q286-ghq3"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-59"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31979.json"
  },
  "details": "Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. Prior to 3.1.0 and 2.3.8, the himmelblaud-tasks daemon, running as root, writes Kerberos cache files under /tmp/krb5cc_\u003cuid\u003e without symlink protections. Since commit 87a51ee, PrivateTmp is explicitly removed from the tasks daemon's systemd hardening, exposing it to the host /tmp. A local user can exploit this via symlink attacks to chown or overwrite arbitrary files, achieving local privilege escalation. This vulnerability is fixed in 3.1.0 and 2.3.8.",
  "id": "CVE-2026-31979",
  "modified": "2026-04-01T23:08:02.422275383Z",
  "published": "2026-03-11T19:47:05.935Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31979.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-44wm-q286-ghq3"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31979"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "himmelblaud-tasks: local privilege escalation via /tmp symlink attack on Kerberos ccache"
}