{"id":"CVE-2026-0234","aliases":["EUVD-2026-21899","GHSA-w48x-mvpf-jfc3"],"status":"published","title":"Cortex XSOAR: Improper Verification of Cryptographic Signature in Microsoft Teams integration","description":"An improper verification of cryptographic signature vulnerability exists in Cortex XSOAR and Cortex XSIAM platforms during integration of Microsoft Teams that enables an unauthenticated user to access and modify protected resources.","severity":{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Red","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00235,"percentile":0.1461,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-347"],"published":"2026-04-13T07:15:03Z","modified":"2026-10-26T21:10:00Z","products":[{"vendor":"palo alto networks","product":"cortex xsiam microsoft teams marketplace"},{"vendor":"palo alto networks","product":"cortex xsoar microsoft teams marketplace"},{"vendor":"paloaltonetworks","product":"cortex_xsiam"},{"vendor":"paloaltonetworks","product":"cortex_xsoar"}],"references":[{"url":"https://security.paloaltonetworks.com/CVE-2026-0234","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-0234"},{"url":"https://github.com/advisories/GHSA-w48x-mvpf-jfc3"}],"sources":{"cve":[{"id":"CVE-2026-0234","title":"Cortex XSOAR: Improper Verification of Cryptographic Signature in Microsoft Teams integration","description":"An improper verification of cryptographic signature vulnerability exists in Cortex XSOAR and Cortex XSIAM platforms during integration of Microsoft Teams that enables an unauthenticated user to access and modify protected resources.","status":"published","published":"2026-04-13T07:15:03.667Z","modified":"2026-04-14T03:55:44.286Z","cvss":[{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Red","level":"high","assessor":"cna"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:20:13.587351Z"}],"euvd":[{"id":"EUVD-2026-21899","description":"An improper verification of cryptographic signature vulnerability exists in Cortex XSOAR and Cortex XSIAM platforms during integration of Microsoft Teams that enables an unauthenticated user to access and modify protected resources.","status":"published","published":"2026-04-13T07:15:03Z","modified":"2026-04-14T03:55:44Z","cvss":[{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Red","level":"high"}],"updated_at":"2026-11-02T19:24:27.052992Z"}],"ghsa":[{"id":"GHSA-w48x-mvpf-jfc3","title":"An improper verification of cryptographic signature vulnerability exists in Cortex XSOAR and...","description":"An improper verification of cryptographic signature vulnerability exists in Cortex XSOAR and Cortex XSIAM platforms during integration of Microsoft Teams that enables an unauthenticated user to access and modify protected resources.","status":"published","published":"2026-04-13T09:31:33Z","modified":"2026-07-07T18:30:27Z","cvss":[{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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:Red","level":"high"},{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T15:09:18.163038Z"}],"nvd":[{"id":"CVE-2026-0234","description":"An improper verification of cryptographic signature vulnerability exists in Cortex XSOAR and Cortex XSIAM platforms during integration of Microsoft Teams that enables an unauthenticated user to access and modify protected resources.","status":"published","published":"2026-04-13T08:16:22.367Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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:Red","level":"high","assessor":"secondary"},{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"primary"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:12:14.37744Z"}]}}