CVE-2026-49132

OPNsense before 26.1.9 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject arbitrary HTML or JavaScript by embedding payloads in the certificate description field via the trust certificate API. The unsanitized description value is persisted and later rendered in the Dashboard Certificates widget through Certificates.js, which interpolates the raw value into HTML attribute and text content sinks without encoding, causing injected scripts to execute in the browser of any authenticated user who views the Dashboard, enabling session hijacking or credential theft.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://docs.opnsense.org/releases/CE_26.1.html#june-02-2026
https://github.com/opnsense/core/commit/12b021ff11db38705e92ac4c9af5e07d602da6ba
https://www.vulncheck.com/advisories/opnsense-stored-xss-via-certificate-description-field

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-03 21:16

Updated : 2026-09-16 20:32

NVD link : CVE-2026-49132

Mitre link : CVE-2026-49132

CVE.ORG link : CVE-2026-49132

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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