CVE-2026-31979 (GCVE-0-2026-31979)
Vulnerability from cvelistv5
Published
2026-03-11 19:47
Modified
2026-03-11 20:07
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Summary
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.
References
| URL | Tags | |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| himmelblau-idm | himmelblau |
Version: >= 1.0.0, < 2.3.8 Version: >= 3.0.0-alpha, < 3.1.0 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-31979",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-11T20:07:04.015032Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-11T20:07:29.194Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "himmelblau",
"vendor": "himmelblau-idm",
"versions": [
{
"status": "affected",
"version": "\u003e= 1.0.0, \u003c 2.3.8"
},
{
"status": "affected",
"version": "\u003e= 3.0.0-alpha, \u003c 3.1.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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\u0027s 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."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-59",
"description": "CWE-59: Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-11T19:47:05.935Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-44wm-q286-ghq3",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-44wm-q286-ghq3"
}
],
"source": {
"advisory": "GHSA-44wm-q286-ghq3",
"discovery": "UNKNOWN"
},
"title": "himmelblaud-tasks: local privilege escalation via /tmp symlink attack on Kerberos ccache"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-31979",
"datePublished": "2026-03-11T19:47:05.935Z",
"dateReserved": "2026-03-10T15:40:10.487Z",
"dateUpdated": "2026-03-11T20:07:29.194Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-31979\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-11T20:07:04.015032Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-11T20:07:25.505Z\"}}], \"cna\": {\"title\": \"himmelblaud-tasks: local privilege escalation via /tmp symlink attack on Kerberos ccache\", \"source\": {\"advisory\": \"GHSA-44wm-q286-ghq3\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 8.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"himmelblau-idm\", \"product\": \"himmelblau\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 1.0.0, \u003c 2.3.8\"}, {\"status\": \"affected\", \"version\": \"\u003e= 3.0.0-alpha, \u003c 3.1.0\"}]}], \"references\": [{\"url\": \"https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-44wm-q286-ghq3\", \"name\": \"https://github.com/himmelblau-idm/himmelblau/security/advisories/GHSA-44wm-q286-ghq3\", \"tags\": [\"x_refsource_CONFIRM\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"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\u0027s 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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-59\", \"description\": \"CWE-59: Improper Link Resolution Before File Access (\u0027Link Following\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-03-11T19:47:05.935Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-31979\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-11T20:07:29.194Z\", \"dateReserved\": \"2026-03-10T15:40:10.487Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-03-11T19:47:05.935Z\", \"assignerShortName\": \"GitHub_M\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…