CVE-2026-49132 · Symaro Security Advisory

Description

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.

Severity (CVSS)

Base score	5.1
Severity	Medium
Version	CVSS 4.0
Vector	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Provided by	CNA

Weaknesses

CWE-79 — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected products

Vendor	Product	Versions
Deciso B.V.	OPNsense	0 to <26.1.9

References

https://docs.opnsense.org/releases/CE_26.1.html#june-02-2026 (release-notes)
https://github.com/opnsense/core/commit/12b021ff11db38705e92ac4c9af5e07d602da6ba (patch)
https://www.vulncheck.com/advisories/opnsense-stored-xss-via-certificate-description-field (third-party-advisory)

Authoritative sources

This page is a snapshot. For the latest enrichment and updates, view the record on CVE.org or the NVD.

Generated from the official CVE List on 04 Aug 2026 07:02 UTC.