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CVE details

CVE-2026-124539

JSON::XS versions before 4.05 for Perl leak the decoded key of an object rejected for a missing colon in decode_hv. Unless it is short plain ASCII, a quoted key is decoded into a new scalar. Nothing frees that scalar when the object is rejected for a missing ':' after the key. A process that keeps running after a failed decode retains one key per rejected document, with its size chosen by the sender. Repeated requests exhaust process memory.

Score
–
Published
2026-11-14
Links
NVD · cve.org · Report wrong data

Matched ports (1)

PortPackageVersionStatusMaintainer
converters/p5-JSON-XSp5-JSON-XS4.04unaddressedsunpoet@FreeBSD.org

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No CPE in the port Makefile

converters/p5-JSON-XS (CPE matched by the package name) has no USES=cpe. The CVE was matched through a CPE from another source, so the package and the version range may belong to a different product. Check the CVE record before using this entry.

  <vuln vid="FIXME (make newentry)">
    <topic>p5-JSON-XS -- FIXME</topic>
    <affects>
      <package>
	<name>p5-JSON-XS</name>
	<range><lt>4.05</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>CVE-2026-124539: JSON::XS versions before 4.05 for Perl leak the
	  decoded key of an object rejected for a missing colon in decode_hv.
	  Unless it is short plain ASCII, a quoted key is decoded into a new
	  scalar. Nothing frees that scalar when the object is rejected for a
	  missing ':' after the key. A process that keeps running after a
	  failed decode retains one key per rejected document, with its size
	  chosen by the sender. Repeated requests exhaust process memory.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-124539</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-124539</url>
    </references>
    <dates>
      <discovery>2026-11-14</discovery>
      <entry>2026-11-15</entry>
    </dates>
  </vuln>