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CVE details

CVE-2026-124540

JSON::XS versions before 4.05 for Perl allow stack exhaustion via nested tagged values under allow_tags in decode_tag. With allow_tags, "(" starts a tagged value. Its tag and value are decoded recursively, and each can start another tagged value. Unlike arrays and objects, this nesting is not counted against max_depth. A run of "(" bytes exhausts the C stack and triggers an uncatchable segmentation fault regardless of max_depth.

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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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.

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-2026-124540: JSON::XS versions before 4.05 for Perl allow stack
	  exhaustion via nested tagged values under allow_tags in decode_tag.
	  With allow_tags, "(" starts a tagged value. Its tag and value are
	  decoded recursively, and each can start another tagged value.
	  Unlike arrays and objects, this nesting is not counted against
	  max_depth. A run of "(" bytes exhausts the C stack and triggers an
	  uncatchable segmentation fault regardless of max_depth.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-124540</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-124540</url>
    </references>
    <dates>
      <discovery>2026-11-14</discovery>
      <entry>2026-11-15</entry>
    </dates>
  </vuln>