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CVE details

CVE-2026-115866

Starlet versions from 0.20 before 0.33 for Perl allow CPU exhaustion via regular expression backtracking when decoding chunked request bodies. A chunk-size line is matched as a run of hex digits, then .* and a CRLF. A run followed by a bare LF and then a CRLF can never match, and the engine retries the match once for each digit, so the time taken grows with the square of the run length. Nothing limits the length of the run, which can span several reads. A remote attacker can occupy a worker for about a minute of CPU time with one 128 KiB request, before the application is called.

Score
–
Published
2026-10-30
Links
NVD · cve.org · Report wrong data

Matched ports (1)

PortPackageVersionStatusMaintainer
www/p5-Starletp5-Starlet0.32unaddressedperl@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.

No CPE in the port Makefile

www/p5-Starlet (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-Starlet -- FIXME</topic>
    <affects>
      <package>
	<name>p5-Starlet</name>
	<range><ge>0.20</ge><lt>0.33</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>CVE-2026-115866: Starlet versions from 0.20 before 0.33 for Perl allow
	  CPU exhaustion via regular expression backtracking when decoding
	  chunked request bodies. A chunk-size line is matched as a run of
	  hex digits, then .* and a CRLF. A run followed by a bare LF and
	  then a CRLF can never match, and the engine retries the match once
	  for each digit, so the time taken grows with the square of the run
	  length. Nothing limits the length of the run, which can span
	  several reads. A remote attacker can occupy a worker for about a
	  minute of CPU time with one 128 KiB request, before the application
	  is called.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-115866</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-115866</url>
    </references>
    <dates>
      <discovery>2026-10-30</discovery>
      <entry>2026-10-30</entry>
    </dates>
  </vuln>