Medium
nagios4 — security advisory
Nagios Core before 4.5.12 contains a cross-site request forgery vulnerability in cmd.cgi where the CSRF protection mechanism passes validation when the NagFormId cookie is absent. Attackers can craft a malicious cross-site POST request to execute arbitrary Nagios commands as a currently authenticated user without their knowledge or consent.
- Products
- nagios4
- Affected versions
- 4.3.4-3, 4.3.4-3ubuntu0.1, 4.4.6-4, 4.4.6-4.1ubuntu1, 4.4.6-4.1ubuntu2, 4.4.6-4ubuntu0.22.04.1, 4.4.6-4ubuntu0.24.04.1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-48548
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:07 UTC · Revision 1
Source evidence
Nagios Core before 4.5.12 contains a cross-site request forgery vulnerability in cmd.cgi where the CSRF protection mechanism passes validation when the NagFormId cookie is absent. Attackers can craft a malicious cross-site POST request to execute arbitrary Nagios commands as a currently authenticated user without their knowledge or consent.
osv:UBUNTU-CVE-2026-48548
nagios4
Fixed versions: Not specified
nagios4
Fixed versions: Not specified
nagios4
Fixed versions: Not specified
nagios4
Fixed versions: Not specified
nagios4
Fixed versions: Not specified
Complete source record
{
"id": "e8990a215f1659e60771df7732fe823690da8307b6255af7cc7b9a285de9ae9f",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-48548",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-48548",
"summary": "Nagios Core before 4.5.12 contains a cross-site request forgery vulnerability in cmd.cgi where the CSRF protection mechanism passes validation when the NagFormId cookie is absent. Attackers can craft a malicious cross-site POST request to execute arbitrary Nagios commands as a currently authenticated user without their knowledge or consent.",
"evidence": "osv:UBUNTU-CVE-2026-48548",
"products": [
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"evidence": "/affected/0/versions"
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{
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"severity": "medium",
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"aliases": [
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"metrics": [
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},
{
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"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
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"affected": [
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],
"modified": "2026-10-17T13:00:23.195860335Z",
"provider": "osv",
"upstream": [
"CVE-2026-48548"
],
"references": [
"https://ubuntu.com/security/CVE-2026-48548",
"https://www.cve.org/CVERecord?id=CVE-2026-48548"
]
},
"related_cves": [
{
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"evidence": "/upstream"
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],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 360467,
"published_at": "2026-08-26T16:16:00+00:00"
}