What’s Vulnerable › Products

http4s blaze vulnerabilities

4 known vulnerabilities, 0 confirmed exploited in the wild (CISA KEV), 3 published in the last 12 months.

Check whether your http4s blaze version is affected

Latest http4s blaze vulnerabilities

• CVE-2026-73494 — blaze: Multiple HTTP/1.1 request-smuggling primitives in blaze's Java wire parser (CVSS 7.4)
• CVE-2026-73495 — blaze: Chunked-body trailer fields promoted into Request.headers in blaze-server (front-end header-sanitization bypass) (CVSS 7.4)
• CVE-2026-73493 — http4s-blaze-server: Unbounded WebSocket message aggregation (CVSS 7.5)
• CVE-2021-21293 — Unbounded connection acceptance leads to file handle exhaustion (CVSS 7.5)