CVE-2026-78605

Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') (CWE-444) in Elasticsearch can lead to information disclosure via HTTP Request Smuggling (CAPEC-33). Under specific proxy deployment configurations, a network attacker could obtain confidential responses intended for other authenticated users.

  • Published Sep 1, 2026
  • CVSS 5.9 medium
  • 0.3% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-78605 at the National Vulnerability Database