PAN-OS: Multiple Cross-Site Scripting (XSS) Vulnerabilities
Summary
| CVE | CVE-2026-0279 |
|---|---|
| State | PUBLISHED |
| Assigner | palo_alto |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-09 19:16:58 UTC |
| Updated | 2026-07-09 20:16:25 UTC |
| Description | Multiple cross site scripting vulnerabilities in the User-ID™ Authentication Portal (aka Captive Portal) service, GlobalProtect™ gateway/portal features and Clientless VPN of Palo Alto Networks PAN-OS® software enables a malicious unauthenticated user to store or execute malicious JavaScript payload. The security risk posed by this issue is minimized when the management interface and access to the User-ID™ Authentication Portal is restricted to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 . This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW is not affected by this vulnerability. |
Risk And Classification
Primary CVSS: v4.0 1.3 LOW from [email protected]
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:D/RE:M/U:Amber
EPSS: 0.011720000 probability, percentile 0.637680000 (date 2026-07-11)
Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 1.3 | LOW | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/C... |
| 4.0 | CNA | CVSS | 1.3 | LOW | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/A... |
| 4.0 | CNA | CVSS | 1.2 | LOW | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/A... |
| 4.0 | CNA | CVSS | 0.4 | LOW | CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/A... |
CVSS v4.0 Breakdown
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:D/RE:M/U:Amber
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Palo Alto Networks | Cloud NGFW | unaffected All custom | Not specified |
| CNA | Palo Alto Networks | PAN-OS | affected 12.1.0 12.1.8 custom | Not specified |
| CNA | Palo Alto Networks | PAN-OS | affected 11.2.0 11.2.13 custom | Not specified |
| CNA | Palo Alto Networks | PAN-OS | affected 11.1.0 11.1.16 custom | Not specified |
| CNA | Palo Alto Networks | PAN-OS | affected 10.2.0 10.2.18-h8 custom | Not specified |
| CNA | Palo Alto Networks | Prisma Access | affected 12.1.0 12.1.8 custom | Not specified |
| CNA | Palo Alto Networks | Prisma Access | affected 11.2.0 custom | Not specified |
| CNA | Palo Alto Networks | Prisma Access | affected 10.2.0 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| security.paloaltonetworks.com/CVE-2026-0279 | [email protected] | security.paloaltonetworks.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: our internal security research teams (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-07-08T20:30:00.000Z | Updated the Unaffected version for Prisma Access. |
| CNA | 2026-07-08T16:00:00.000Z | Initial publication |
Solutions
CNA: Version Minor Version Suggested Solution Cloud NGFW No action needed.PAN-OS 12.112.1.2 through 12.1.7-h*Upgrade to 12.1.8 or later.PAN-OS 11.211.2.0 through 11.2.12Upgrade to 11.2.13 or later.PAN-OS 11.111.1.0 through 11.1.15-h* Upgrade to 11.1.16 or later.PAN-OS 10.210.2.0 through 10.2*Upgrade to 11.1.16, 11.2.13, 12.1.8 or later.All older unsupported PAN-OS versions Upgrade to a supported fixed version. Prisma Access 12.112.1.2 through 12.1.7-h* Upgrade to 12.1.8 or later.*Prisma Access 11.211.2.0 through 11.2*Upgrade to 12.1.8 or later.*Prisma Access 10.210.2.0 through 10.2*Upgrade to 12.1.8 or later.* * See the note under Product Status for information regarding Prisma Access upgrades.
Workarounds
CNA: The vast majority of firewalls already follow Palo Alto Networks' and industry best practices. However, if you have not already, we strongly recommend that you secure access to your management interface according to our best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 . Specifically, you should restrict management interface access to only trusted internal IP addresses. Review information about how to secure management access to your Palo Alto Networks firewalls: https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 * https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 Palo Alto Networks LIVEcommunity article https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 * Palo Alto Networks official and detailed technical documentation https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrative-access-best-practices
Exploits
CNA: Palo Alto Networks is not aware of any malicious exploitation of these issues.