EUVD-2026-21899
GHSA-w48x-mvpf-jfc3
CVSS VectorNVD
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
Lifecycle Timeline
9DescriptionNVD
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.
AnalysisAI
Cryptographic signature bypass in Palo Alto Networks Cortex XSOAR and XSIAM Microsoft Teams integrations (versions 1.5.0 through 1.5.51) allows unauthenticated remote attackers to access and modify protected resources. The vulnerability stems from improper JWT verification (CWE-347), enabling attackers to forge authentication tokens. …
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RemediationAI
Within 24 hours: Identify all deployments of Cortex XSOAR and XSIAM with Microsoft Teams integration versions 1.5.0-1.5.51; disable or isolate affected integrations pending patching. Within 7 days: upgrade Microsoft Teams integration to version 1.5.52 or later on all affected instances; test functionality post-upgrade. …
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