RUSTSEC-2026-0420GHSA-HMMR-87QQ-258J
wasip3 UDP `send` can deliver a datagram to an address only allowed for receiving
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 48.0.8, 49.0.5, 50.0.1
- 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
The vulnerability affects Wasmtime, the WebAssembly runtime, specifically its WASIp3 UDP networking implementation. A WebAssembly guest could use the UDP send function to deliver a datagram to an address that should only be permitted for receiving, potentially bypassing the intended network access restrictions.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hmmr-87qq-258j For more information see the GitHub-hosted security advisory.
Timeline
- Advisory published
- Record last updated
- First seen by cve.now
Affected versions
- wasmtime-wasicrates.io
From 48.0.0 · fixed in 48.0.8; From 49.0.0 · fixed in 49.0.5; From 50.0.0 · fixed in 50.0.1