CVE-2026-18904

IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to obtain sensitive information and inject unauthorized messages due to a namespace collision between user identifiers.

  • Published Aug 28, 2026
  • CVSS 8.2 high
  • 0.3% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-18904 at the National Vulnerability Database