CVE-2026-49131

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Source
https://cve.org/CVERecord?id=CVE-2026-49131
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49131.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-49131
Published
2026-08-03T20:29:48.071Z
Modified
2026-08-07T11:50:19.842673580Z
Severity
  • 5.1 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
OPNsense < 26.1.9 Stored XSS via Firewall Rule Description Field
Details

OPNsense before 26.1.9 contains a stored cross-site scripting vulnerability that allows authenticated attackers with firewall rule management privileges to inject arbitrary HTML or JavaScript by embedding payloads in the firewall rule description field via the filter API endpoint. The unsanitized description value is persisted and later rendered through the default cell formatter in opnsense_bootgrid.js, which assigns raw cell content to innerHTML, causing injected scripts to execute in the browser of any authenticated user who views the Firewall Rules page, enabling session hijacking or credential theft.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49131.json"
}
References

Affected packages

Git / github.com/opnsense/core

Affected ranges

Type
GIT
Repo
https://github.com/opnsense/core
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b11d6b340716e240868ab19a369e058a46f0876f
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "26.1.9"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

15.*
15.1
15.1.1
15.1.10
15.1.10.2
15.1.11
15.1.11.1
15.1.11.2
15.1.11.3
15.1.11.4
15.1.12
15.1.2
15.1.3
15.1.4
15.1.5
15.1.6
15.1.6.1
15.1.7
15.1.7.1
15.1.7.2
15.1.8
15.1.8.1
15.1.8.2
15.1.8.3
15.1.8.4
15.1.9
15.1.9.1
15.1.9.2
15.7
16.*
16.7.a
16.7.b
16.7.r
17.*
17.1.a
17.1.b
17.1.r
17.7.a
17.7.b
17.7.r
18.*
18.1.a
18.1.b
18.1.r
18.7.a
18.7.b
18.7.r
19.*
19.1.a
19.1.b
19.1.r
19.7.a
19.7.b
19.7.r
20.*
20.1.a
20.1.b
20.1.r
20.7.a
20.7.b
20.7.r
21.*
21.1.a
21.1.b
21.1.r
21.7.a
21.7.b
21.7.r
22.*
22.1.a
22.1.b
22.1.r
22.7.a
22.7.b
22.7.r
23.*
23.1.a
23.1.b
23.1.r
23.7.a
23.7.b
23.7.r
24.*
24.1.a
24.1.b
24.1.r
24.7.a
24.7.b
24.7.r
25.*
25.1.a
25.1.b
25.1.r
25.7.a
25.7.b
25.7.r
26.*
26.1
26.1.1
26.1.2
26.1.3
26.1.4
26.1.5
26.1.6
26.1.7
26.1.8
26.1.a
26.1.b
26.1.r
26.1.r1
26.1.r2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49131.json"