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CVE details

CVE-2026-119143

Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows guest code to trigger a host panic through out-of-bounds zero-length stream operations. Malicious guests can perform zero-length component model stream reads or writes with unvalidated addresses, causing Direct{Source,Destination}::remaining to panic and crash WASIp3 embedders.

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-2026-119143: Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before
	  49.0.3 contains a denial of service vulnerability that allows guest
	  code to trigger a host panic through out-of-bounds zero-length
	  stream operations. Malicious guests can perform zero-length
	  component model stream reads or writes with unvalidated addresses,
	  causing Direct{Source,Destination}::remaining to panic and crash
	  WASIp3 embedders.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-119143</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-119143</url>
    </references>
    <dates>
      <discovery>2026-10-29</discovery>
      <entry>2026-10-29</entry>
    </dates>
  </vuln>