Skip to content
Fencer Intel
no cvss —

CVE-2026-121006 json

HTTP::Body versions before 1.24_02 for Perl parse the trailer in quadratic time

published 3d ago modified 3d ago also EUVD-2026-117992

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits
0
none known

Summary

HTTP::Body versions before 1.24_02 for Perl parse the trailer in quadratic time.

Everything after the last chunk in the same call to add() is parsed with HTTP::Headers, which takes time quadratic in the number of fields of one name. For example, it takes several seconds to parse 16 KiB of "a:" lines.

A remote attackercan exhause the CPU with a single request.

HTTP::Body version 1.25 limits the size and number of lines in the trailer.

Patch / fix

  • cpan HTTP-Body 1.24_02
  • libhttp-body-perl Debian 14 1.25-1

debian advisories DEBIAN-CVE-2026-121006

  • perl-HTTP-Body openSUSE Tumbleweed 1.250.0-1.1

opensuse advisories openSUSE-SU-2026:12467-1

Is CVE-2026-121006 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-09).

Affected products

  • cpan HTTP-Body

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.