CyberSecBulletin
CVE-2026-0296NVD status: Undergoing Analysis

GlobalProtect App: Improper Certificate Validation

Published Updated By the CyberSecBulletin desk

CVE-2026-0296 is a high-severity improper certificate validation vulnerability in GlobalProtect App from Palo Alto Networks, with a CVSS 3.1 base score of 7.4 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 6.3.3-h15, 6.0.15, 6.3.3-h14 as the first without the flaw, so updating GlobalProtect App to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.26% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update GlobalProtect App to 6.3.3-h15 or 6.0.15 or 6.3.3-h14 or 6.2.8-h13, whichever matches your release line, or a later version.
  2. Update Globalprotect to 6.0.15 or 6.2.8 or 6.3.3, whichever matches your release line, or a later version.
  3. Read the advisory on security.paloaltonetworks.com for workarounds and exact fixed builds.
  4. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
Palo Alto NetworksGlobalProtect App6.3.0 up to, but not including, 6.3.3-h15; 6.2.0; 6.0.0 up to, but not including, 6.0.15; 6.3.0 up to, but not including, 6.3.3-h14; 6.2.0 up to, but not including, 6.2.8-h136.3.3-h15, 6.0.15, 6.3.3-h14, 6.2.8-h13
Palo Alto NetworksGlobalprotect6.0.0 up to, but not including, 6.0.15; 6.2.0 up to, but not including, 6.2.8; 6.2.0 through 6.2.9; 6.3.0 up to, but not including, 6.3.3; 6.2.8; 6.3.36.0.15, 6.2.8, 6.3.3

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
HighSuccess depends on conditions outside the attacker's control.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
NoneAvailability is not affected.

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 4.04.5MediumCNA (paloaltonetworks.com)
CVSS 3.17.4HighNVD

Official description

Improper certificate validation vulnerabilities in Palo Alto Networks GlobalProtect™ app enable an unauthenticated attacker with man-in-the-middle (MitM) access to intercept and modify application communications. VPN tunnel traffic is not impacted. The GlobalProtect app on iOS, Android, and Chrome OS is not affected.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Certificate Validation

The product does not validate, or incorrectly validates, a certificate.

How developers prevent this class of flaw

  • Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
  • If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.

More Improper Certificate Validation vulnerabilities (CWE-295)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in GlobalProtect App

All GlobalProtect App vulnerabilities

Recent Improper Certificate Validation vulnerabilities

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