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CVE details

CVE-2026-119134

Wasmtime before 36.0.18, 37.0.0 before 48.0.6, and 49.0.0 before 49.0.3 caps component-model resource handle tables only per component instance and does not charge handle allocations to any ResourceLimiter or StoreLimits. A malicious guest can repeatedly call resource.new and instantiate sub-components to exceed the per-instance cap many times over, causing unbounded host memory growth.

Score
6.9 medium
Published
2026-10-29
Links
NVD · cve.org · Report wrong data

Matched ports (1)

PortPackageVersionStatusMaintainer
devel/libwasmtimelibwasmtime49.0.2_1unaddressedlongros@FreeBSD.org

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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-2026-119134: Wasmtime before 36.0.18, 37.0.0 before 48.0.6, and
	  49.0.0 before 49.0.3 caps component-model resource handle tables
	  only per component instance and does not charge handle allocations
	  to any ResourceLimiter or StoreLimits. A malicious guest can
	  repeatedly call resource.new and instantiate sub-components to
	  exceed the per-instance cap many times over, causing unbounded host
	  memory growth.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-119134</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-119134</url>
    </references>
    <dates>
      <discovery>2026-10-29</discovery>
      <entry>2026-10-29</entry>
    </dates>
  </vuln>