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Description

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.

PUBLISHED Reserved 2025-11-03 | Published 2026-05-13 | Updated 2026-05-30 | Assigner palo_alto




HIGH: 7.8CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:N/E:A/AU:N/R:A/V:D/RE:M/U:Red

CISA Known Exploited Vulnerability

Date added 2026-05-29 | Due date 2026-06-01

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Problem types

CWE-565 Reliance on Cookies without Validation and Integrity Checking

Product status

Default status
unaffected

All (custom)
unaffected

Default status
unaffected

12.1.0 (custom) before 12.1.7, 12.1.4-h6
affected

11.2.0 (custom) before 11.2.12, 11.2.10-h7, 11.2.7-h14, 11.2.4-h17
affected

11.1.0 (custom) before 11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33
affected

10.2.0 (custom) before 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34
affected

Default status
unaffected

10.2.0 (custom) before 10.2.10-h36
affected

11.2.0 (custom) before 11.2.7-h13
affected

Timeline

2026-05-13:Initial publication.
2026-05-29:Updated exploitation status.

Credits

Palo Alto Networks thanks our internal security research teams for discovering and reporting this issue. other

References

www.cisa.gov/...nerabilities-catalog?field_cve=CVE-2026-0257 government-resource

security.paloaltonetworks.com/CVE-2026-0257 vendor-advisory

cve.org (CVE-2026-0257)

nvd.nist.gov (CVE-2026-0257)

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