Vulnerability · Published Aug 3, 2026 · Assigned by VulnCheck

CVE-2026-49132OPNsense < 26.1.9 Stored XSS via Certificate Description Field

Medium 5.4

In plain English

A medium-severity cross-site scripting in OPNsense from Deciso B.V.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.2%top 91.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Deciso B.V.	OPNsense	0 – before 26.1.9

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References

Release Notes release-notes
Patch Commit patch
https://www.vulncheck.com/advisories/opnsense-stored-xss-via-certificate-description-field third-party-advisory