What is CVE-2026-0234?

CVE-2026-0234 is a critical-severity vulnerability in Palo Alto Networks Cortex Xsiam Microsoft Teams Marketplace, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.1/10. Published 2026-04-13.

How severe is CVE-2026-0234?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Palo Alto Networks Cortex Xsiam Microsoft Teams Marketplace

CVE-2026-0234

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.

EPSS: 0.002 (14.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Palo Alto Networks Cortex Xsiam Microsoft Teams Marketplace — versions 1.5.0
Palo Alto Networks Cortex Xsoar Microsoft Teams Marketplace — versions 1.5.0
Paloaltonetworks Cortex_xsiam
Paloaltonetworks Cortex_xsoar

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

psirt@paloaltonetworks.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-0234?: CVE-2026-0234 is a critical-severity vulnerability in Palo Alto Networks Cortex Xsiam Microsoft Teams Marketplace, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.1/10. Published 2026-04-13.
How severe is CVE-2026-0234?: Critical severity. CVSS v3 base score is 9.1 out of 10.