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CVE-2026-78849 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

Cross Site Scripting vulnerability in Netgate pfSense Plus software versions <= 26.03 pfSense CE software versions <= 2.8.1 allows a remote attacker to execute arbitrary code via the captive_portal_status.widget.php file

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:8.5 HIGHVector:CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

CNA: CISA-ADPCVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://redmine.pfsense.org/attachments/6991	CISA-ADP	ExploitIssue TrackingVendor
https://docs.netgate.com/downloads/pfSense-SA-26_05.webgui.asc	[email protected]	AdvisoryRemedyVendor
https://redmine.pfsense.org/issues/16773	[email protected]	ExploitIssue TrackingTechnical DescriptionVendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	CISA-ADP

Affected Products

Product	Versions
Netgate pfSense Plus	<= 26.03
CPE cpe:2.3:a:netgate:pfsense_plus:::::::: Remediation Upgrade: 26.07moderate efforthttps://docs.netgate.com/pfsense/en/latest/install/upgrade-guide.html Patch: (26.03, 25.11.1)moderate efforthttps://docs.netgate.com/pfsense/en/latest/development/system-patches.html Workaround:low effort Remove the Captive Portal widget from the Dashboard. Workaround:low effort Configure Captive Portal to use some form of authentication. Mitigation:low effort Do not log into the firewall with the same browser used for non-administrative web browsing.
Netgate pfSense CE	<= 2.8.1 (semver)
CPE cpe:2.3:a:netgate:pfsense:::::::: Remediation Upgrade: 2.9.0moderate efforthttps://docs.netgate.com/pfsense/en/latest/install/upgrade-guide.html Patch: (2.8.1)moderate efforthttps://docs.netgate.com/pfsense/en/latest/development/system-patches.html Workaround:low effort Remove the Captive Portal widget from the Dashboard. Workaround:low effort Configure Captive Portal to use some form of authentication. Mitigation:low effort Do not log into the firewall with the same browser used for non-administrative web browsing.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 14, 2026	CVE Modified	CISA-ADP
Sep 4, 2026	New CVE Received	[email protected]