Prisma Access Agent: Improper Certificate Validation on iOS

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• paloaltonetworks prisma access agentbefore 26.2.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (palo_alto). Independent of NVD's CPE analysis and usually ahead of it.

• Palo Alto Networks Prisma Access Agent

  • Allnot affected
  • before 26.2.1affectedfixed in 26.2.1

Other highest-scoring records for the same primary product.

• CVE-2026-0294Prisma Access Agent: Local Privilege Escalation
  24Monitor
• CVE-2026-0248Prisma Access Agent: Improper Certificate Validation Vulnerability
  24Monitor
• CVE-2026-0278Prisma Access Agent: Multiple DLP Policy Bypass Vulnerabilities on Windows
  23Monitor
• CVE-2026-0247Prisma Access Agent Endpoint DLP: Authorization Bypass Vulnerabilities
  23Monitor
• CVE-2026-0246Prisma Access Agent: Local Privilege Escalation Vulnerability
  23Monitor
• CVE-2026-0293Prisma Access Agent: Anti-Tamper Protection Bypass on Windows
  22Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

A certificate validation error is silently swallowed instead of terminating the connection. Often, code added for a test environment makes its way into production.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1override fun checkServerTrusted(chain: Array<X509Certificate>, type: String) {2  // Left empty for the test environment3}

1val client = OkHttpClient.Builder()2  .certificatePinner(3    CertificatePinner.Builder()4      .add("api.sirius.example", "sha256/…")5      .build()6  ).build()

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.