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2026-018: Critical Vulnerabilities in PHP

On 20 October 2026, the PHP foundation announced an upcoming security release addressing two critical vulnerabilities in PHP that could lead to remote code execution, according to other leaks.<br> At this time, no technical details have been made public. CERT-EU advises organisations to prepare for immediate patching of affected assets. Where immediate patching is not feasible, organisations should consider isolating internet-facing applications from public networks until a fix is available.<br> The PHP team has scheduled the release for 21 October 2026 at 14:00 UTC.<br>
CRITICAL
Severity & confidence
Source severitycritical
Platform severitycritical
Confidencehigh
Exploitationunknown
CVSS-
Affected
CountriesEU
Reporting sources (1)
CERT-EU - Security Advisories
Open source โ†—
Timeline & provenance
Published2026-10-20T20:36:51
Last updated2026-10-22T06:57:52
Ingested2026-10-20T20:36:51
FreshnessNEAR-REAL-TIME
Threat typeadvisory
Recommended action
No recommended action published with this item - review the original source.
Next steps
  1. Identify affected systems in your environment.
  2. Apply the vendor patch or mitigation guidance.
  3. Review logs for indicators described in the advisory.
  4. Follow the affected vendor/product to track updates.
Confidence explanation
Reported by a government or cert-grade source (CISA, NCSC, NVD, ENISA, MSRC).
Source type: gov ยท Original: CERT-EU - Security Advisories