Vulnerability · Published Oct 26, 2026 · Assigned by NCSC.ch
CVE-2026-115425Multiple cross-site scripting (XSS) in OPNsense
Medium 5.6
In plain English
A medium-severity cross-site scripting in OPNsense firewall from OPNsense. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).
Severity (CVSS 4.0)5.6Medium
Exploit odds (30 days)0.3%top 77.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Multiple cross site scripting (XSS) vulnerabilities affect OPNsense firewall vesrion 26.7.1_1 and earlier allows low privileged attacker to execute Javascript in the context of another user visiting a specific page or clicking on a specifically crafted link.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| OPNsense | OPNsense firewall | 0 – through 26.7.1_1 |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:P/S:P/AU:Y/R:I/V:C/RE:M/U:Amber
References
- https://digitalcanion.com/security-research/#ghsa-9h93-hhcx-957c third-party-advisory
- https://github.com/opnsense/core/security/advisories/GHSA-9h93-hhcx-957c vendor-advisory