CVE-2026-119136
Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains insufficient checks in Store when mixing async-style and sync-style WebAssembly calls. Embedders re-entering WebAssembly via sync APIs from host functions called asynchronously can trigger runtime panics or unsound cross-thread movement of !Send host variables.
- Score
- 5.9 medium
- Published
- 2026-10-29
- Links
- NVD · cve.org · Report wrong data
Matched ports (1)
| Port | Package | Version | Status | Maintainer |
|---|---|---|---|---|
| devel/libwasmtime | libwasmtime | 49.0.2_1 | unaddressed | longros@FreeBSD.org |
Template for a VuXML entry
Check the version numbers before you commit this entry. Some ports share an entry in the CVE database with another port, such as sqlite2 and sqlite3. The version shown here may then be one that never existed for this port.
Ranges per package from the CVE rows that match this port, in pkg notation with the port's epoch and revision, every bound checked with pkg; one range per epoch the port actually had. make newentry in security/vuxml creates the vid.
<vuln vid="FIXME (make newentry)">
<topic>libwasmtime -- FIXME</topic>
<affects>
<package>
<name>libwasmtime</name>
<!-- 49.0.3 is not released yet, newest upstream is 49.0.2 -->
<range><ge>49.0.0</ge><lt>49.0.3</lt></range>
</package>
</affects>
<description>
<body xmlns="http://www.w3.org/1999/xhtml">
<p>CVE-2026-119136: Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before
49.0.3 contains insufficient checks in Store when mixing async-
style and sync-style WebAssembly calls. Embedders re-entering
WebAssembly via sync APIs from host functions called asynchronously
can trigger runtime panics or unsound cross-thread movement of
!Send host variables.</p>
</body>
</description>
<references>
<cvename>CVE-2026-119136</cvename>
<url>https://nvd.nist.gov/vuln/detail/CVE-2026-119136</url>
</references>
<dates>
<discovery>2026-10-29</discovery>
<entry>2026-10-29</entry>
</dates>
</vuln>