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No exploitation reportedFix availableAwaiting NVD analysis

CVE-2026-116267

MIME::Parser versions before 5.521 for Perl allow memory exhaustion via indented error messages from a truncated, deeply nested message

No exploitation reported by the sources we read.

  • Published2026-10-28
  • WeaknessCWE-407

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

MIME::Parser versions before 5.521 for Perl allow memory exhaustion via indented error messages from a truncated, deeply nested message. Each stored parser diagnostic is indented by three spaces per nesting level. When a message nested N levels deep ends without its closing boundaries, every level logs an error at its own depth, so the stored diagnostics grow with the square of N. The defaults place no limit on nesting depth.

Timeline

dates in UTC
  1. 2026-10-2817:32CVE 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 2026-10-28

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

  • libmime-tools-perlUbuntu:26.10all versions · no fixed version listed
  • libmime-tools-perlUbuntu:26.04:LTSall versions · no fixed version listed
  • libmime-tools-perlUbuntu:24.04:LTSall versions · no fixed version listed
  • libmime-tools-perlUbuntu:22.04:LTSall versions · no fixed version listed
  • libmime-tools-perlUbuntu:20.04:LTSall versions · no fixed version listed
  • libmime-tools-perlUbuntu:18.04:LTSall versions · no fixed version listed
  • libmime-tools-perlUbuntu:16.04:LTSall versions · no fixed version listed
  • libmime-tools-perlUbuntu:14.04:LTSall versions · no fixed version listed

5 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-116267 Red Hat Product Security1 known affected

    perl-MIME-tools: perl-MIME-tools: Denial of Service via memory exhaustion from deeply nested messages

    perl-MIME-tools.src as a component of Red Hat Enterprise Linux 6

Full record on NVD

Fix

  1. No fix available, says the vendor Red Hat Product Security CVE-2026-116267 · 1 productAffected

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
2026-10-28
Last Modified
2026-11-05
NVD status
Awaiting Analysis
GitHub Advisory
GHSA-4hx4-q2mp-7h24

Frequently asked questions

What is CVE-2026-116267?

MIME::Parser versions before 5.521 for Perl allow memory exhaustion via indented error messages from a truncated, deeply nested message. Each stored parser diagnostic is indented by three spaces per nesting level. When a message nested N levels deep ends without its closing boundaries, every level logs an error at its own depth, so the stored diagnostics grow with the square of N. The defaults place no limit on nesting depth.

Is CVE-2026-116267 actively exploited?

Active exploitation of CVE-2026-116267 has not been confirmed. Its EPSS score was 0.2% on 2026-11-05, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-116267?

CVE-2026-116267 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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