CVE-2026-115425: Multiple cross site scripting (XSS) vulnerabilities affect OPNsense firewall vesrion 26.7.1_1 and earlier allo

Q: How do I fix CVE-2026-115425?

opnsense firewall: upgrade to newer than 26.7.1_1. Exact commands for each OS are on this page.

Q: Is CVE-2026-115425 being exploited?

CVE-2026-115425 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-115425 affect?

CVE-2026-115425 affects opnsense firewall. Severity is medium (CVSS 5.6). 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 specific

Q: How urgent is CVE-2026-115425?

Priority 20/100. No elevated risk signals yet.

Routine

MEDIUM 5.6UPGRADE

CVE-2026-115425 is a medium-severity flaw (CVSS 5.6) affecting opnsense firewall. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.6 (Medium)
EPSS exploit chance	n/a
CISA exploited list	No
Published	2026-10-26
Last modified	2026-10-26

Publisher (CNA): NCSC.ch · Vendor: opnsense · Source: CVE Program record (NVD analysis pending)

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-26 08:10 UTCPublished CVE record published
2026-10-26 08:10 UTCUpdated Record last modified

opnsense opnsense firewall UPGRADE

Affected: <= 26.7.1_1

Fixed in: newer than 26.7.1_1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy opnsense-firewall || rpm -q opnsense-firewall || opnsense-firewall --version

2. UPGRADE to newer than 26.7.1_1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade opnsense-firewall

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade opnsense-firewall

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-115425?

opnsense firewall: upgrade to newer than 26.7.1_1. Exact commands for each OS are on this page.

Is CVE-2026-115425 being exploited?

CVE-2026-115425 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-115425 affect?

CVE-2026-115425 affects opnsense firewall. Severity is medium (CVSS 5.6). 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 specific

How urgent is CVE-2026-115425?

Priority 20/100. No elevated risk signals yet.

Software pages

pfSense and OPNsense vulnerabilities

References

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