CVE catalog

CVE-2024-45614

Puma vulnerability

Puma is a Ruby/Rack web server built for parallelism. In affected versions clients could clobber values set by intermediate proxies (such as X-Forwarded-For) by providing a underscore version of the same header (X-Forwarded_For). Any users relying on proxy set variables is affected. v6.4.3/v5.6.9 now discards any headers using underscores if the non-underscore version also exists. Effectively, allowing the proxy defined headers to always win. Users are advised to upgrade. Nginx has a underscores_in_headers configuration variable to discard these headers at the proxy level as a mitigation. Any users that are implicitly trusting the proxy defined headers for security should immediately cease doing so until upgraded to the fixed versions.

Severity: Medium · CVSS 5.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Published: Sep 19, 2024, 11:15:11 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.64% · Oct 27, 2026

Projects and upstream resources

[puma][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": "puma",
      "status": "fixed",
      "release": "sid",
      "version": "8.0.2-3"
    },
    {
      "name": "puma",
      "status": "fixed",
      "release": "forky",
      "version": "8.0.2-3"
    },
    {
      "name": "puma",
      "status": "fixed",
      "release": "trixie",
      "version": "6.6.0-4"
    },
    {
      "name": "puma",
      "status": "fixed",
      "release": "bookworm",
      "version": "5.6.5-3+deb12u1"
    },
    {
      "name": "puma",
      "status": "fixed",
      "release": "bookworm-security",
      "version": "5.6.5-3+deb12u2"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1082379,
      "name": "puma",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "6.4.3-1"
    },
    {
      "bug": 1082379,
      "name": "puma",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "6.4.3-1"
    },
    {
      "bug": 1082379,
      "name": "puma",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "6.4.3-1"
    },
    {
      "bug": 1082379,
      "name": "puma",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "5.6.5-3+deb12u1"
    }
  ],
  "distribution_packages": [
    {
      "name": "puma",
      "distro": "ubuntu",
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "6.4.2-4ubuntu4.3"
    },
    {
      "name": "puma",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.4.2-4ubuntu4.3"
            }
          ]
        }
      ],
      "release": "24.04",
      "versions": [
        "5.6.5-4ubuntu2",
        "5.6.5-4ubuntu3",
        "6.4.2-4ubuntu1",
        "6.4.2-4ubuntu3",
        "6.4.2-4ubuntu4"
      ],
      "ecosystem": "deb",
      "fixed_version": "6.4.2-4ubuntu4.3",
      "provider_record_id": "USN-7031-1"
    },
    {
      "name": "puma",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.5.2-2ubuntu2+esm2"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "4.3.6-1ubuntu4",
        "5.5.2-2ubuntu2",
        "5.5.2-2ubuntu2+esm1"
      ],
      "ecosystem": "deb",
      "fixed_version": "5.5.2-2ubuntu2+esm2",
      "provider_record_id": "USN-7031-2"
    },
    {
      "name": "rubygem-puma",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.4.3-1.1"
            }
          ]
        }
      ],
      "release": "tumbleweed",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "6.4.3-1.1",
      "provider_record_id": "OPENSUSE-SU-2024:14474-1"
    },
    {
      "name": "puma",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.5.2-2ubuntu2+esm2"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "4.3.6-1ubuntu4",
        "5.5.2-2ubuntu2",
        "5.5.2-2ubuntu2+esm1"
      ],
      "ecosystem": "deb",
      "fixed_version": "5.5.2-2ubuntu2+esm2",
      "provider_record_id": "UBUNTU-CVE-2024-45614"
    },
    {
      "name": "puma",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.4.2-4ubuntu4.3"
            }
          ]
        }
      ],
      "release": "24.04",
      "versions": [
        "5.6.5-4ubuntu2",
        "5.6.5-4ubuntu3",
        "6.4.2-4ubuntu1",
        "6.4.2-4ubuntu3",
        "6.4.2-4ubuntu4"
      ],
      "ecosystem": "deb",
      "fixed_version": "6.4.2-4ubuntu4.3",
      "provider_record_id": "UBUNTU-CVE-2024-45614"
    }
  ]
}

[Debian bug #1082379]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[puma]Unknown
Details (2)
- 5.6.5-3+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 5.6.5-3+deb12u1
  usn · puma · debian · bookworm; usn · puma · debian · 12
- 5.6.5-3+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 5.6.5-3+deb12u1
  usn · puma · debian · bookworm; usn · puma · debian · 12

[Debian 13 (Trixie)]

[puma]Unknown
Details (2)
- 6.6.0-4 · amd64 · trixie
  Fixed · Fixed: 6.4.3-1
  usn · puma · debian · 13
- 6.6.0-4 · arm64 · trixie
  Fixed · Fixed: 6.4.3-1
  usn · puma · debian · 13

[openSUSE Tumbleweed]

[ruby4.0-rubygem-puma]Unknown
Source package: [rubygem-puma]
Details (1)
- 6.4.3-1.9 · x86_64 · tumbleweed
  Unknown · Fixed: 6.4.3-1.1
  Version impact unknown
  usn · rubygem-puma · opensuse · tumbleweed

Observed: Oct 27, 2026, 1:57:17 AM UTC

References

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