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CVE details

CVE-2026-124541

JSON::XS versions before 4.05 for Perl leak the decoded part of a rejected long string in decode_str. A string is decoded through a fixed-size buffer (16 KiB in 4.04), and each time the buffer fills its contents move into a new scalar. Nothing frees that scalar when the string is then rejected for a control character, an invalid escape, malformed UTF-8 or the end of the input. A process that keeps running after a failed decode retains the decoded part of each rejected string, 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-2026-124541: JSON::XS versions before 4.05 for Perl leak the
	  decoded part of a rejected long string in decode_str. A string is
	  decoded through a fixed-size buffer (16 KiB in 4.04), and each time
	  the buffer fills its contents move into a new scalar. Nothing frees
	  that scalar when the string is then rejected for a control
	  character, an invalid escape, malformed UTF-8 or the end of the
	  input. A process that keeps running after a failed decode retains
	  the decoded part of each rejected string, with its size chosen by
	  the sender. Repeated requests exhaust process memory.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-124541</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-124541</url>
    </references>
    <dates>
      <discovery>2026-11-14</discovery>
      <entry>2026-11-15</entry>
    </dates>
  </vuln>