RUSTSEC-2026-0363GHSA-Q554-3CJC-RX7P
Component-model handle tables are capped only per instance and charged to no limit
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 36.0.18, 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, the WebAssembly runtime from the Bytecode Alliance, is affected when running WebAssembly component-model code. Because handle tables are limited only per instance and not counted against any overall resource limit, a guest can allocate far more handles than intended, potentially exhausting host memory.
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-q554-3cjc-rx7p For more information see the GitHub-hosted security advisory.
Timeline
- Advisory published
- Record last updated
Affected versions
- wasmtimecrates.io
From 0.0.0-0 · fixed in 36.0.18; From 37.0.0 · fixed in 48.0.6; From 49.0.0 · fixed in 49.0.3