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CVE details

CVE-2026-119132

Wasmtime from 49.0.0 before 49.0.3 contains a denial-of-service vulnerability that allows a WebAssembly guest to trigger a host panic by transcoding overlapping strings in fused adapters. Attackers can make a same-instance component-to-component call transferring a string whose source and destination alias each other, crashing the host instead of raising a trap.

Score
5.9 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-2026-119132: Wasmtime from 49.0.0 before 49.0.3 contains a denial-
	  of-service vulnerability that allows a WebAssembly guest to trigger
	  a host panic by transcoding overlapping strings in fused adapters.
	  Attackers can make a same-instance component-to-component call
	  transferring a string whose source and destination alias each
	  other, crashing the host instead of raising a trap.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-119132</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-119132</url>
    </references>
    <dates>
      <discovery>2026-10-29</discovery>
      <entry>2026-10-29</entry>
    </dates>
  </vuln>