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4 vulnerabilities by Deciso B.V.
CVE-2026-49132 (GCVE-0-2026-49132)
Vulnerability from nvd – Published: 2026-08-03 20:35 – Updated: 2026-08-04 17:06 X_Open Source
VLAI
EPSS
VEX
Title
OPNsense < 26.1.9 Stored XSS via Certificate Description Field
Summary
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.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 17:06 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://docs.opnsense.org/releases/CE_26.1.html#j… | release-notes |
| https://github.com/opnsense/core/commit/12b021ff1… | patch |
| https://www.vulncheck.com/advisories/opnsense-sto… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Deciso B.V. | OPNsense |
Affected:
0 , < 26.1.9
(semver)
|
Date Public
2026-06-02 00:00
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CVE-2026-49131 (GCVE-0-2026-49131)
Vulnerability from nvd – Published: 2026-08-03 20:29 – Updated: 2026-08-04 14:00 X_Open Source
VLAI
EPSS
VEX
Title
OPNsense < 26.1.9 Stored XSS via Firewall Rule Description Field
Summary
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.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 14:00 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://docs.opnsense.org/releases/CE_26.1.html#j… | release-notes |
| https://github.com/opnsense/core/commit/b11d6b340… | patch |
| https://www.vulncheck.com/advisories/opnsense-sto… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Deciso B.V. | OPNsense |
Affected:
0 , < 26.1.9
(semver)
|
Date Public
2026-06-02 00:00
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CVE-2026-49132 (GCVE-0-2026-49132)
Vulnerability from cvelistv5 – Published: 2026-08-03 20:35 – Updated: 2026-08-04 17:06 X_Open Source
VLAI
EPSS
VEX
Title
OPNsense < 26.1.9 Stored XSS via Certificate Description Field
Summary
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.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 17:06 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://docs.opnsense.org/releases/CE_26.1.html#j… | release-notes |
| https://github.com/opnsense/core/commit/12b021ff1… | patch |
| https://www.vulncheck.com/advisories/opnsense-sto… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Deciso B.V. | OPNsense |
Affected:
0 , < 26.1.9
(semver)
|
Date Public
2026-06-02 00:00
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CVE-2026-49131 (GCVE-0-2026-49131)
Vulnerability from cvelistv5 – Published: 2026-08-03 20:29 – Updated: 2026-08-04 14:00 X_Open Source
VLAI
EPSS
VEX
Title
OPNsense < 26.1.9 Stored XSS via Firewall Rule Description Field
Summary
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.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 14:00 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://docs.opnsense.org/releases/CE_26.1.html#j… | release-notes |
| https://github.com/opnsense/core/commit/b11d6b340… | patch |
| https://www.vulncheck.com/advisories/opnsense-sto… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Deciso B.V. | OPNsense |
Affected:
0 , < 26.1.9
(semver)
|
Date Public
2026-06-02 00:00
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"affected": [
{
"defaultStatus": "affected",
"packageURL": "pkg:github/opnsense/core",
"product": "OPNsense",
"repo": "https://github.com/opnsense/core",
"vendor": "Deciso B.V.",
"versions": [
{
"lessThan": "26.1.9",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Alex Williams from Pellera Technologies"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulnCheck"
}
],
"datePublic": "2026-06-02T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 5.1,
"baseSeverity": "MEDIUM",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "LOW",
"userInteraction": "PASSIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "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",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-03T20:35:21.687Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "Release Notes",
"tags": [
"release-notes"
],
"url": "https://docs.opnsense.org/releases/CE_26.1.html#june-02-2026"
},
{
"name": "Patch Commit",
"tags": [
"patch"
],
"url": "https://github.com/opnsense/core/commit/b11d6b340716e240868ab19a369e058a46f0876f"
},
{
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/opnsense-stored-xss-via-firewall-rule-description-field"
}
],
"source": {
"discovery": "UNKNOWN"
},
"tags": [
"x_open-source"
],
"title": "OPNsense \u003c 26.1.9 Stored XSS via Firewall Rule Description Field",
"x_generator": {
"engine": "vulncheck"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-49131",
"datePublished": "2026-08-03T20:29:48.071Z",
"dateReserved": "2026-05-27T17:40:12.738Z",
"dateUpdated": "2026-08-04T14:00:52.400Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}