Nagios Enterprises Nagios Core up to 4.5.11 CSRF Protection Mechanism cmd.cgi cross-site request forgery

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.30-

Summaryinfo

A vulnerability has been found in Nagios Enterprises Nagios Core up to 4.5.11 and classified as problematic. Impacted is an unknown function of the file cmd.cgi of the component CSRF Protection Mechanism. Performing a manipulation results in cross-site request forgery. This vulnerability is known as CVE-2026-48548. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Nagios Enterprises Nagios Core up to 4.5.11. This affects an unknown part of the file cmd.cgi of the component CSRF Protection Mechanism. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. CWE is classifying the issue as CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. This is going to have an impact on integrity. The summary by CVE is:

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.

It is possible to read the advisory at nagios.com. This vulnerability is uniquely identified as CVE-2026-48548 since 05/21/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 4.5.12 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross-site request forgery
CWE: CWE-352 / CWE-862 / CWE-863
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Nagios Core 4.5.12

Timelineinfo

05/21/2026 CVE reserved
08/26/2026 +97 days Advisory disclosed
08/26/2026 +0 days VulDB entry created
08/26/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: nagios.com
Status: Confirmed

CVE: CVE-2026-48548 (🔒)
GCVE (CVE): GCVE-0-2026-48548
GCVE (VulDB): GCVE-100-395895

Entryinfo

Created: 08/26/2026 18:08
Changes: 08/26/2026 18:08 (77)
Complete: 🔍
Cache ID: 216::103

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