CVE catalog

CVE-2026-110678

Cpanel::JSON::XS versions before 4.80 for Perl allow…

Cpanel::JSON::XS versions before 4.80 for Perl allow memory exhaustion by buffering incremental input past max_size in incr_parse. The parser appends each chunk to its buffer. In scalar or list context, it compares max_size with how far it has progressed, not with the buffer length. A chunk that starts with a NUL byte stops the parser before it progresses, and a call in void context skips the check, so the buffer grows without limit. A peer streaming data to an incr_parse consumer can exhaust process memory regardless of max_size.

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Oct 19, 2026, 6:11:58 PM UTC
Updated: Oct 19, 2026, 7:17:21 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.17% · Oct 27, 2026

Projects and upstream resources

[libcpanel-json-xs-perl][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence

Original provider fields

{
  "package_releases": [
    {
      "name": "libcpanel-json-xs-perl",
      "status": "fixed",
      "release": "sid",
      "version": "4.80-1"
    },
    {
      "name": "libcpanel-json-xs-perl",
      "status": "fixed",
      "release": "forky",
      "version": "4.80-1"
    },
    {
      "name": "libcpanel-json-xs-perl",
      "status": "vulnerable",
      "release": "trixie",
      "version": "4.39-2~deb13u1"
    },
    {
      "name": "libcpanel-json-xs-perl",
      "status": "vulnerable",
      "release": "trixie-security",
      "version": "4.39-2~deb13u1"
    },
    {
      "name": "libcpanel-json-xs-perl",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "4.35-1+deb12u1"
    },
    {
      "name": "libcpanel-json-xs-perl",
      "status": "vulnerable",
      "release": "bookworm-security",
      "version": "4.35-1+deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "libcpanel-json-xs-perl",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "4.80-1"
    },
    {
      "bug": null,
      "name": "libcpanel-json-xs-perl",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "4.80-1"
    },
    {
      "bug": null,
      "name": "libcpanel-json-xs-perl",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": null,
      "name": "libcpanel-json-xs-perl",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": [
    {
      "name": "libcpanel-json-xs-perl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "16.04",
      "versions": [
        "3.0115-1",
        "3.0210-1ubuntu1"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-110678"
    },
    {
      "name": "libcpanel-json-xs-perl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "18.04",
      "versions": [
        "3.0225-1build1",
        "3.0239-1"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-110678"
    },
    {
      "name": "libcpanel-json-xs-perl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "4.12-1",
        "4.12-1build1",
        "4.15-1",
        "4.17-1",
        "4.18-1",
        "4.19-1",
        "4.19-1build1",
        "4.19-1ubuntu0.1"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-110678"
    },
    {
      "name": "libcpanel-json-xs-perl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "22.04",
      "versions": [
        "4.25-1build1",
        "4.25-1build2",
        "4.27-1",
        "4.27-1build1",
        "4.27-1ubuntu0.1",
        "4.27-1ubuntu0.2"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-110678"
    },
    {
      "name": "libcpanel-json-xs-perl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "24.04",
      "versions": [
        "4.37-1",
        "4.37-1build1",
        "4.37-1build2",
        "4.37-1build3",
        "4.37-1ubuntu0.1"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-110678"
    },
    {
      "name": "libcpanel-json-xs-perl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "26.10",
      "versions": [
        "4.40-1",
        "4.42-1",
        "4.42-1build1"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-110678"
    },
    {
      "name": "libcpanel-json-xs-perl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "26.04",
      "versions": [
        "4.39-2",
        "4.40-1"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-110678"
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[libcpanel-json-xs-perl]Unknown
Details (4)
- 4.35-1+deb12u1 · amd64 · bookworm
  Affected
  nvd · libcpanel-json-xs-perl · debian · bookworm; nvd · libcpanel-json-xs-perl · debian · 12
- 4.35-1+deb12u1 · arm64 · bookworm
  Affected
  nvd · libcpanel-json-xs-perl · debian · bookworm; nvd · libcpanel-json-xs-perl · debian · 12
- 4.35-1+deb12u1 · amd64 · bookworm-security
  Affected
  nvd · libcpanel-json-xs-perl · debian · bookworm; nvd · libcpanel-json-xs-perl · debian · 12
- 4.35-1+deb12u1 · arm64 · bookworm-security
  Affected
  nvd · libcpanel-json-xs-perl · debian · bookworm; nvd · libcpanel-json-xs-perl · debian · 12

[Debian 13 (Trixie)]

[libcpanel-json-xs-perl]Unknown
Details (4)
- 4.39-2~deb13u1 · amd64 · trixie
  Affected
  nvd · libcpanel-json-xs-perl · debian · 13
- 4.39-2~deb13u1 · arm64 · trixie
  Affected
  nvd · libcpanel-json-xs-perl · debian · 13
- 4.39-2~deb13u1 · amd64 · trixie-security
  Affected
  nvd · libcpanel-json-xs-perl · debian · 13
- 4.39-2~deb13u1 · arm64 · trixie-security
  Affected
  nvd · libcpanel-json-xs-perl · debian · 13

Observed: Oct 27, 2026, 4:09:06 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]