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HighVulnerabilityCVE-2026-116131updated 28 Oct 2026, 18:37 UTC

Perl HTTP::Body can be overwhelmed by form data with too many fields

A web app using this Perl module can be crashed by a single request that sends a huge number of form fields or file parts. The server runs out of memory or fills its disk with temporary files.

Fixed in Version 1.23_01 or laterOfficial, 2 sources
SeverityHighVulnerability
Being exploited?UnclearNo reports either way yet
Fix available?YesVersion 1.23_01 or later · since 28 Oct 2026
How sure is this?Official, 2 sourcesBacked by an official source

How the attack works simplified

  1. 1AttackerSends one crafted request
  2. 2Body parserCreates a scalar per separator
  3. 3MemoryGrows with each separator byte
  4. 4Temp filesOne file per filename part
  5. ResultServer memory and disk exhausted

What happened

HTTP::Body for Perl, before 1.23_01, has no limit on the number of fields or multipart parts in urlencoded or multipart request bodies, causing memory and temporary file exhaustion.

Why it is dangerous: A remote, unauthenticated attacker can send one crafted request to slow or crash the web worker and fill server storage, causing denial of service for the application.

Are you affected?

You are affected if you run a Perl application or web framework that uses HTTP::Body versions before 1.23_01 to parse incoming form or multipart request bodies.

HTTP::Body for Perl, versions before 1.23_01

What to do

  1. Update the HTTP::Body Perl module to version 1.23_01 or later
  2. Restart web workers after updating so the new code is loaded
  3. Set request body size and upload limits at your web server or proxy as an extra layer

Timeline

  1. 28 Oct 2026, 18:17 UTC
    Publicly disclosed
  2. 28 Oct 2026, 18:18 UTC
    Reported by oss-security · oss-security
  3. 28 Oct 2026, 18:30 UTC
    Picked up by Zero Radar
  4. 28 Oct 2026, 18:37 UTC
    NVD reported on it · NVD

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Security researchers research teams and mailing lists

Technical details

ID
CVE-2026-116131
Disclosed
28 Oct 2026, 18:17 UTC
On Zero Radar
28 Oct 2026, 18:30 UTC (13 min after disclosure)
Last change
28 Oct 2026, 18:37 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

Perl HTTP::Body can be overwhelmed by form data with too many fields · Zero Radar