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No exploitation reportedFix availableAwaiting NVD analysis

CVE-2026-121006

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

No exploitation reported by the sources we read.

  • Published2026-11-06
  • WeaknessCWE-770

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-11-0607:47CVE publishedCNA

Versions per branch

Products declared by the CNA1 product

As CPANSec, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-06

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libhttp-body-perlUbuntu:26.10all versions · no fixed version listed
  • libhttp-body-perlUbuntu:26.04:LTSall versions · no fixed version listed
  • libhttp-body-perlUbuntu:24.04:LTSall versions · no fixed version listed
  • libhttp-body-perlUbuntu:22.04:LTSall versions · no fixed version listed
  • libhttp-body-perlUbuntu:20.04:LTSall versions · no fixed version listed
  • libhttp-body-perlUbuntu:18.04:LTSall versions · no fixed version listed
  • libhttp-body-perlUbuntu:16.04:LTSall versions · no fixed version listed
  • libhttp-body-perlDebian:14all versions · fixed in 1.25-1

3 more package ranges on OSV.dev

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2026-11-06
Last Modified
2026-11-10
NVD status
Received
GitHub Advisory
GHSA-f4c2-m2fq-wp7w

Frequently asked questions

What is CVE-2026-121006?

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.

Is CVE-2026-121006 actively exploited?

Active exploitation of CVE-2026-121006 has not been confirmed. Its EPSS score was 0.2% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-121006?

CVE-2026-121006 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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