CVE-2026-0234 Cortex XSOAR: Improper Verification of Cryptographic Signature in Microsoft Teams integration
An unauthenticated attacker can bypass cryptographic signature verification in the Microsoft Teams integration to access and modify protected resources.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-0234?
CVE-2026-0234 is a high-severity vulnerability in Palo Alto Networks Cortex XSIAM Microsoft Teams Marketplace, published on 13 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-347
Which versions are affected by CVE-2026-0234?
It affects 2 products.
Products include Paloaltonetworks Cortex Xsiam, Paloaltonetworks Cortex Xsoar.
How do I fix CVE-2026-0234?
No fix has been published for CVE-2026-0234 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-0234 being exploited?
There is no known exploitation of CVE-2026-0234 in the wild and no public exploit code.
Sources
Also known as GHSA-w48x-mvpf-jfc3.