CVE-2026-119143RUSTSEC-2026-0357GHSA-93G3-36P8-X2GC
Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Panic via Zero-Length Stream Writes
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 48.0.6, 49.0.3
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows guest code to trigger a host panic through out-of-bounds zero-length stream operations. Malicious guests can perform zero-length component model stream reads or writes with unvalidated addresses, causing Direct{Source,Destination}::remaining to panic and crash WASIp3 embedders.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- bytecodealliance wasmtime
From 46.0.0 · fixed in 48.0.6; From 49.0.0 · fixed in 49.0.3
- wasmtimecrates.io
From 46.0.0 · fixed in 48.0.6; From 49.0.0 · fixed in 49.0.3