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CVE PROGRAM SOURCE RECORD6.9 Medium

CVE-2026-119131

Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Host Panic via wasi-http

Description

Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability in wasmtime-wasi-http that lets guests crash the host by sending long request URLs. Guests can use set-path-with-query with a '?' after byte 65535, overflowing a u16 index in the http crate and triggering a host panic.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

bytecodealliance wasmtime

Default version status: unaffected

  • 46.0.0 to < 48.0.6affected
  • 48.0.6unaffected
  • 49.0.0 to < 49.0.3affected
  • 49.0.3unaffected
pkg:cargo/wasmtime-wasi-http

References