5.3
MediumCVSS 3.1 · from VulnCheck
CVE-2026-119131
Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Host Panic via wasi-http
wasmtime · Integer overflow · CWE-190Affectedwasmtime
FixUpdate to 48.0.6, 49.0.3 or newer
PublishedOct 29, 15:58 · VulnCheck
ScoredOct 29 · 5.3 · VulnCheck
Exploit code publicNone known · checked 21:18 UTC
ExploitedNone known · CISA KEV checked 22:04 UTC
What we know
No known exploitation. CISA KEV, checked 22:04 UTC.
No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 21:18 UTC.
An attacker only needs network access to the target. No login needed. CVSS: network, no privileges.
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.
From VulnCheck
Affected and fixed versions
ProductAffectedFixed inwasmtime46.0.0 – before 48.0.648.0.6wasmtimeNot affected48.0.6wasmtime49.0.0 – before 49.0.349.0.3wasmtimeNot affected49.0.3
Exploit code
Exploit-DBnone knownMetasploitnone knownNucleinone known