{"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.\n\nPanorama 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","slug":"CVE-2026-0257","body":"## Overview\n\nAuthentication 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.\n\nPanorama and Cloud NGFW are not impacted by these issues.\n\n## Affected\n\n- `cloud_ngfw`\n- `PAN-OS >= 12.1.0 < 12.1.7, 12.1.4-h6`\n- `PAN-OS >= 11.2.0 < 11.2.12, 11.2.10-h7, 11.2.7-h14, 11.2.4-h17`\n- `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`\n- `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`\n- `prisma_access >= 10.2.0 < 10.2.10-h36`\n- `prisma_access >= 11.2.0 < 11.2.7-h13`\n\n## Remediation\n\nVersion\nMinor Version\nSuggested Solution\nCloud NGFW All\nNo action needed.\n                                PAN-OS 12.1\n\n                                12.1.5 through 12.1.6\n                                Upgrade to 12.1.7 or later.\n                            \n                                \n                                12.1.2 through 12.1.4-h*\n                                Upgrade to 12.1.4-h6 or 12.1.7 or later.\n                            \n                                PAN-OS 11.2\n\n                                11.2.11 or later\n                                Upgrade to 11.2.12 or later.\n                            \n                                \n                                11.2.8 through 11.2.10-h*\n                                Upgrade to 11.2.10-h7 or 11.2.12 or later.\n                            \n                                \n                                11.2.5 through 11.2.7-h*\n                                Upgrade to 11.2.7-h14 or 11.2.12 or later.\n                            \n                                \n                                11.2.0 through 11.2.4-h*\n                                Upgrade to 11.2.4-h17 or 11.2.12 or later.\n                            \n                                PAN-OS 11.1\n\n                                11.1.14 or later\n                                Upgrade to 11.1.15 or later.\n                            \n                                \n                                11.1.11 through 11.1.13-h*\n                                Upgrade to 11.1.13-h5 or 11.1.15 or later.\n                            \n                                \n                                11.1.8 through 11.1.10-h*\n                                Upgrade to 11.1.10-h25 or 11.1.15 or later.\n                            \n                                \n                                11.1.7 through 11.1.7-h*\n                                Upgrade to 11.1.7-h6 or 11.1.15 or later.\n                            \n                                \n                                11.1.5 through 11.1.6-h*\n                                Upgrade to 11.1.6-h32 or 11.1.15 or later.\n                            \n                                \n                                11.1.0 through 11.1.4-h*\n                                Upgrade to 11.1.4-h33 or 11.1.15 or later.\n                            \n                                PAN-OS 10.2\n\n                                10.2.17 through 10.2.18-h*\n                                Upgrade to 10.2.18 or 10.2.18-h6 or later.\n                            \n                                \n                                10.2.14 through 10.2.16-h*\n                                Upgrade to 10.2.16-h7 or 10.2.18 or later.\n                            \n                                \n                                10.2.11 through 10.2.13-h*\n                                Upgrade to 10.2.13-h21 or 10.2.18 or later.\n                            \n                                \n                                10.2.8 through 10.2.10-h*\n                                Upgrade to 10.2.10-h36 or 10.2.18 or later.\n                            \n                                \n                                10.2.0 through 10.2.7-h*\n                                Upgrade to 10.2.7-h34 or 10.2.18 or later.\n                            All older\nunsupported\nPAN-OS versions Upgrade to a supported fixed version.\n                                Prisma Access 10.2\n\n                                10.2.0 through 10.2.10-h*\n                                Upgrade to 10.2.10-h36 or later.\n                            \n                                Prisma Access 11.2\n\n                                11.2.0 through 11.2.7-h*\n                                Upgrade to 11.2.7-h13 or later.\n\nNote: 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.\n\n### Workarounds\n\nCustomers can mitigate the risk of this issue by taking any of the following actions:\n\n\n\n\n\n  *  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.\n  *  Disable Authentication Override: Uncheck the Authentication Override options (for generating and accepting cookies) in the GlobalProtect portal and gateway configuration.","depth":"abyssal","depthScore":92,"depthScoreParts":{"impact":42.9,"likelihood":19.4,"exploitation":25,"ransomware":5},"changes":[]}