Auth Bypass in PAN-OS GlobalProtect Portal/Gateway
CVE-2026-0257 Published on May 13, 2026
PAN-OS: GlobalProtect Authentication Bypass Vulnerabilities
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.
Panorama and Cloud NGFW are not impacted by these issues.
Timeline
Initial publication.
Weakness Type
Reliance on Cookies without Validation and Integrity Checking
The application relies on the existence or values of cookies when performing security-critical operations, but it does not properly ensure that the setting is valid for the associated user. Attackers can easily modify cookies, within the browser or by implementing the client-side code outside of the browser. Reliance on cookies without detailed validation and integrity checking can allow attackers to bypass authentication, conduct injection attacks such as SQL injection and cross-site scripting, or otherwise modify inputs in unexpected ways.
Products Associated with CVE-2026-0257
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Affected Versions
Palo Alto Networks Cloud NGFW:- Version All is unaffected.
- Version 12.1.0 and below 12.1.7, 12.1.4-h6 is affected.
- Version 11.2.0 and below 11.2.12, 11.2.10-h7, 11.2.7-h14, 11.2.4-h17 is affected.
- Version 11.1.0 and below 11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33 is affected.
- Version 10.2.0 and below 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34 is affected.
- Version 10.2.0 and below 10.2.10-h36 is affected.
- Version 11.2.0 and below 11.2.7-h13 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.