--- id: CVE-2026-0257 title: 'PAN-OS: GlobalProtect Authentication Bypass Vulnerabilities' summary: >- Authentication bypass vulnerabilities in the GlobalProtect portal and gateway of Palo Alto Networks PAN-OS® software allows the attacker to bypass security restrictions and establish an unauthorized VPN connection. Panorama and Cloud NG… severity: high cvss: 7.8 cvssVector: >- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:N/E:A/AU:N/R:A/V:D/RE:M/U:Red cvssSource: cna cwe: - CWE-565 vendor: Palo Alto Networks product: Cloud NGFW affected: - cloud_ngfw - 'PAN-OS >= 12.1.0 < 12.1.7, 12.1.4-h6' - 'PAN-OS >= 11.2.0 < 11.2.12, 11.2.10-h7, 11.2.7-h14, 11.2.4-h17' - >- PAN-OS >= 11.1.0 < 11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33 - >- PAN-OS >= 10.2.0 < 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34 - prisma_access >= 10.2.0 < 10.2.10-h36 - prisma_access >= 11.2.0 < 11.2.7-h13 ssvc: exploitation: active automatable: 'no' technicalImpact: total timestamp: '2026-05-28T00:00:00+00:00' exploited: true exploitAvailable: true published: '2026-05-13' updated: '2026-10-15' sourceUpdated: '2026-10-15T01:11:26.182Z' source: CVEORG sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-0257' references: - url: 'https://security.paloaltonetworks.com/CVE-2026-0257' tags: - cve.org - in-the-wild - exploit-available - kev epss: 0.96895 epssPercentile: 0.99889 kev: true kevDateAdded: '2026-05-29' kevDueDate: '2026-06-01' kevRansomware: true exploits: github: 7 githubRepos: - 'https://github.com/sfewer-r7/CVE-2026-0257' - 'https://github.com/0xBlackash/CVE-2026-0257' - 'https://github.com/tushargurav28/CVE-2026-0257' nuclei: - javascript/cves/2026/CVE-2026-0257 checkedAt: '2026-10-15T05:53:20.620Z' ingestedAt: '2026-10-15T05:52:46.055Z' --- ## Overview Authentication bypass vulnerabilities in the GlobalProtect portal and gateway of Palo Alto Networks PAN-OS® software allows the attacker to bypass security restrictions and establish an unauthorized VPN connection. Panorama and Cloud NGFW are not impacted by these issues. ## Affected - `cloud_ngfw` - `PAN-OS >= 12.1.0 < 12.1.7, 12.1.4-h6` - `PAN-OS >= 11.2.0 < 11.2.12, 11.2.10-h7, 11.2.7-h14, 11.2.4-h17` - `PAN-OS >= 11.1.0 < 11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33` - `PAN-OS >= 10.2.0 < 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34` - `prisma_access >= 10.2.0 < 10.2.10-h36` - `prisma_access >= 11.2.0 < 11.2.7-h13` ## Remediation Version Minor Version Suggested Solution Cloud NGFW All No action needed. PAN-OS 12.1 12.1.5 through 12.1.6 Upgrade to 12.1.7 or later. 12.1.2 through 12.1.4-h* Upgrade to 12.1.4-h6 or 12.1.7 or later. PAN-OS 11.2 11.2.11 or later Upgrade to 11.2.12 or later. 11.2.8 through 11.2.10-h* Upgrade to 11.2.10-h7 or 11.2.12 or later. 11.2.5 through 11.2.7-h* Upgrade to 11.2.7-h14 or 11.2.12 or later. 11.2.0 through 11.2.4-h* Upgrade to 11.2.4-h17 or 11.2.12 or later. PAN-OS 11.1 11.1.14 or later Upgrade to 11.1.15 or later. 11.1.11 through 11.1.13-h* Upgrade to 11.1.13-h5 or 11.1.15 or later. 11.1.8 through 11.1.10-h* Upgrade to 11.1.10-h25 or 11.1.15 or later. 11.1.7 through 11.1.7-h* Upgrade to 11.1.7-h6 or 11.1.15 or later. 11.1.5 through 11.1.6-h* Upgrade to 11.1.6-h32 or 11.1.15 or later. 11.1.0 through 11.1.4-h* Upgrade to 11.1.4-h33 or 11.1.15 or later. PAN-OS 10.2 10.2.17 through 10.2.18-h* Upgrade to 10.2.18 or 10.2.18-h6 or later. 10.2.14 through 10.2.16-h* Upgrade to 10.2.16-h7 or 10.2.18 or later. 10.2.11 through 10.2.13-h* Upgrade to 10.2.13-h21 or 10.2.18 or later. 10.2.8 through 10.2.10-h* Upgrade to 10.2.10-h36 or 10.2.18 or later. 10.2.0 through 10.2.7-h* Upgrade to 10.2.7-h34 or 10.2.18 or later. All older unsupported PAN-OS versions Upgrade to a supported fixed version. Prisma Access 10.2 10.2.0 through 10.2.10-h* Upgrade to 10.2.10-h36 or later. Prisma Access 11.2 11.2.0 through 11.2.7-h* Upgrade to 11.2.7-h13 or later. Note: With this fix, if the firewall is configured to use an authentication override cookie for the GlobalProtect Portal or Gateway, it will regenerate the cookie using a more secure method. Therefore, GP users will need to re-authenticate after a PAN-OS upgrade, even if a valid cookie is present. This is a one time requirement. Once they re-authenticate after the upgrade, the authentication override cookie and its validity will work as they do today. ### Workarounds Customers can mitigate the risk of this issue by taking any of the following actions: * Use a dedicated certificate for Authentication Override cookies: Generate a new certificate exclusively for authentication override cookies and store it securely. Do not reuse the portal or gateway certificate, and do not share this certificate with other features or users. * Disable Authentication Override: Uncheck the Authentication Override options (for generating and accepting cookies) in the GlobalProtect portal and gateway configuration.