CVE-2026-31979

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Source
https://cve.org/CVERecord?id=CVE-2026-31979
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31979.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-31979
Aliases
  • GHSA-44wm-q286-ghq3
Downstream
Related
Published
2026-03-11T19:47:05.935Z
Modified
2026-04-10T18:44:17.061657074Z
Severity
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
Summary
himmelblaud-tasks: local privilege escalation via /tmp symlink attack on Kerberos ccache
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_<uid> 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.

Database specific 
{
    "cwe_ids": [
        "CWE-59"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31979.json"
}
References

Affected packages

Git / github.com/himmelblau-idm/himmelblau

Affected ranges

Type
GIT
Repo
https://github.com/himmelblau-idm/himmelblau
Events
Introduced
d01709bf0100183045927c03b90db78fb8e40bda
Fixed
dec3693cbb151b4686b0d926b95379c71f391b1a
Database specific 
{
    "versions": [
        {
            "introduced": "1.0.0"
        },
        {
            "fixed": "2.3.8"
        }
    ]
}
Type
GIT
Repo
https://github.com/himmelblau-idm/himmelblau
Events
Introduced
cf9255c3ffea77705e9725b18f39d520b3b07f59
Fixed
9079a98b44beb1c4e77215a262b95e6fd44c1dfb
Database specific 
{
    "versions": [
        {
            "introduced": "3.0.0-alpha"
        },
        {
            "fixed": "3.1.0"
        }
    ]
}

Affected versions

1.*
1.0.0
2.*
2.0.0
2.0.0-alpha
2.0.0-beta
2.0.1
2.0.2
2.0.3
2.0.4
2.0.5
2.1.0
2.2.0
2.3.0
2.3.1
2.3.2
2.3.3
2.3.4
2.3.5
2.3.6
2.3.7
3.*
3.0.0
3.0.0-alpha
3.0.0-beta
3.0.0-beta2
3.0.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31979.json"