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CVE-2026-49132
5.1 MEDIUM
- CVSS version (CVSS): 4.0
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Attack Requirement (AT): None (N)
- Privileges Required (PR): Low (L)
- User Interaction (UI): Passive (P)
- Vulnerable System Impact Confidentiality (VC): None (N)
- Vulnerable System Impact Integrity (VI): None (N)
- Vulnerable System Impact Availability (VA): None (N)
- Subsequent System Impact Confidentiality (SC): Low (L)
- Subsequent System Impact Integrity (SI): Low (L)
- Subsequent System Impact Availability (SA): None (N)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Attack Requirement (MAT): None (N)
- Modified Privileges Required (MPR): Low (L)
- Modified User Interaction (MUI): Passive (P)
- Modified Vulnerable System Impact Confidentiality (MVC): None (N)
- Modified Vulnerable System Impact Integrity (MVI): None (N)
- Modified Vulnerable System Impact Availability (MVA): None (N)
- Modified Subsequent System Impact Confidentiality (MSC): Low (L)
- Modified Subsequent System Impact Integrity (MSI): Low (L)
- Modified Subsequent System Impact Availability (MSA): Negligible (N)
- Safety (S): Not Defined (X)
- Automatable (AU): Not Defined (X)
- Recovery (R): Not Defined (X)
- Value Density (V): Not Defined (X)
- Vulnerability Response Effort (RE): Not Defined (X)
- Provider Urgency (U): Not Defined (X)
- Confidentiality Req. (CR): Not Defined (X)
- Integrity Req. (IR): Not Defined (X)
- Availability Req. (AR): Not Defined (X)
- Exploit Maturity (E): Not Defined (X)
by @LeSuisse Activity log
- Created suggestion
- @LeSuisse dismissed (not in Nixpkgs)
OPNsense < 26.1.9 Stored XSS via Certificate Description Field
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.
References
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Release Notes release-notes
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Patch Commit patch
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https://www.vulncheck.com/advisories/opnsense-stored-xss-via-certificate-descri… third-party-advisory
Affected products
OPNsense
- <26.1.9
Matching in nixpkgs
pkgs.prometheus-opnsense-exporter
Prometheus exporter for opnsense firewall appliances
pkgs.python313Packages.pyopnsense
Python client for the OPNsense API
pkgs.python314Packages.aiopnsense
Async Python client library for OPNsense
Package maintainers
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@paepckehh Michael Paepcke <git@paepcke.de>
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@fabaff Fabian Affolter <mail@fabian-affolter.ch>
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@JamieMagee Jamie Magee <jamie.magee@gmail.com>