CVE catalog

CVE-2026-2708

A request smuggling vulnerability exists in libsoup's…

A request smuggling vulnerability exists in libsoup's HTTP/1 header parsing logic. The soup_message_headers_append_common() function in libsoup/soup-message-headers.c unconditionally appends each header value without validating for duplicate or conflicting Content-Length fields. This allows an attacker to send HTTP requests containing multiple Content-Length headers with differing values.

Severity: High · CVSS 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Published: Feb 18, 2026, 8:13:57 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.32% · Oct 27, 2026

Projects and upstream resources

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": "libsoup3",
      "status": "fixed",
      "release": "sid",
      "version": "3.8.0-3"
    },
    {
      "name": "libsoup3",
      "status": "fixed",
      "release": "forky",
      "version": "3.8.0-3"
    },
    {
      "name": "libsoup3",
      "status": "vulnerable",
      "release": "trixie",
      "version": "3.6.5-3"
    },
    {
      "name": "libsoup3",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "3.2.3-0+deb12u2"
    },
    {
      "name": "libsoup2.4",
      "status": "vulnerable",
      "release": "trixie",
      "version": "2.74.3-10.1"
    },
    {
      "name": "libsoup2.4",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "2.74.3-1+deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1128582,
      "name": "libsoup3",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "3.8.0-1"
    },
    {
      "bug": 1128582,
      "name": "libsoup3",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "3.8.0-1"
    },
    {
      "bug": 1128582,
      "name": "libsoup3",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1128582,
      "name": "libsoup3",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": null,
      "name": "libsoup2.4",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": null,
      "name": "libsoup2.4",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": [
    {
      "name": "libsoup2.4",
      "ecosystem": "cpe",
      "fixed_version": "not yet fixed"
    },
    {
      "name": "libsoup3",
      "ecosystem": "cpe",
      "fixed_version": "not yet fixed"
    },
    {
      "name": "libsoup",
      "ecosystem": "cpe",
      "fixed_version": ""
    },
    {
      "name": "enterprise_linux",
      "ecosystem": "cpe",
      "fixed_version": ""
    },
    {
      "name": "libsoup2",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.74.3-17.1"
            }
          ]
        }
      ],
      "release": "tumbleweed",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "2.74.3-17.1",
      "provider_record_id": "OPENSUSE-SU-2026:10246-1"
    },
    {
      "name": "libsoup",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.6.6-1.1"
            }
          ]
        }
      ],
      "release": "tumbleweed",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "3.6.6-1.1",
      "provider_record_id": "OPENSUSE-SU-2026:10245-1"
    },
    {
      "name": "libsoup2.4",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "2.74.3-10.1ubuntu4",
        "2.74.3-10.1ubuntu5",
        "2.74.3-10.1ubuntu5+esm1",
        "2.74.3-10.1ubuntu5+esm2",
        "2.74.3-10.1ubuntu5+esm3"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-2708"
    },
    {
      "name": "libsoup2.4",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "22.04",
      "versions": [
        "2.72.0-3ubuntu3",
        "2.74.1-1",
        "2.74.2-2",
        "2.74.2-3",
        "2.74.2-3ubuntu0.1",
        "2.74.2-3ubuntu0.2",
        "2.74.2-3ubuntu0.3",
        "2.74.2-3ubuntu0.4",
        "2.74.2-3ubuntu0.5",
        "2.74.2-3ubuntu0.6",
        "2.74.2-3ubuntu0.7",
        "2.74.2-3ubuntu0.8",
        "2.74.2-3ubuntu0.9"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-2708"
    },
    {
      "name": "libsoup3",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "3.0.4-2",
        "3.0.4-3",
        "3.0.5-1",
        "3.0.7-0ubuntu1",
        "3.0.7-0ubuntu1+esm1",
        "3.0.7-0ubuntu1+esm2",
        "3.0.7-0ubuntu1+esm3",
        "3.0.7-0ubuntu1+esm4",
        "3.0.7-0ubuntu1+esm5",
        "3.0.7-0ubuntu1+esm6",
        "3.0.7-0ubuntu1+esm7",
        "3.0.7-0ubuntu1+esm8",
        "3.0.7-0ubuntu1+esm9"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-2708"
    },
    {
      "name": "libsoup2.4",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "24.04",
      "versions": [
        "2.74.3-1",
        "2.74.3-2",
        "2.74.3-3",
        "2.74.3-6",
        "2.74.3-6build1",
        "2.74.3-6ubuntu1",
        "2.74.3-6ubuntu1.1",
        "2.74.3-6ubuntu1.2",
        "2.74.3-6ubuntu1.3",
        "2.74.3-6ubuntu1.4",
        "2.74.3-6ubuntu1.5",
        "2.74.3-6ubuntu1.6",
        "2.74.3-6ubuntu1.7",
        "2.74.3-6ubuntu1.8",
        "2.74.3-6ubuntu1.9"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-2708"
    },
    {
      "name": "libsoup3",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "24.04",
      "versions": [
        "3.4.2-4",
        "3.4.4-1",
        "3.4.4-2",
        "3.4.4-4",
        "3.4.4-5",
        "3.4.4-5build1",
        "3.4.4-5build2",
        "3.4.4-5ubuntu0.1",
        "3.4.4-5ubuntu0.2",
        "3.4.4-5ubuntu0.3",
        "3.4.4-5ubuntu0.4",
        "3.4.4-5ubuntu0.5",
        "3.4.4-5ubuntu0.6",
        "3.4.4-5ubuntu0.7",
        "3.4.4-5ubuntu0.8",
        "3.4.4-5ubuntu0.9"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-2708"
    },
    {
      "name": "libsoup2.4",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "25.10",
      "versions": [
        "2.74.3-10",
        "2.74.3-10.1",
        "2.74.3-10.1ubuntu1",
        "2.74.3-10.1ubuntu2",
        "2.74.3-10.1ubuntu3",
        "2.74.3-10.1ubuntu4",
        "2.74.3-10.1ubuntu4.1"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-2708"
    },
    {
      "name": "libsoup3",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "25.10",
      "versions": [
        "3.6.5-1",
        "3.6.5-1ubuntu1",
        "3.6.5-3",
        "3.6.5-4",
        "3.6.5-4ubuntu0.1",
        "3.6.5-4ubuntu0.2"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-2708"
    },
    {
      "name": "libsoup2.4",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "26.10",
      "versions": [
        "2.74.3-10.1ubuntu5"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-2708"
    },
    {
      "name": "libsoup3",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "26.10",
      "versions": [
        "3.6.6-1",
        "3.6.6-1ubuntu3"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-2708"
    },
    {
      "name": "libsoup3",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "26.04",
      "versions": [
        "3.6.5-4",
        "3.6.5-5",
        "3.6.5-6",
        "3.6.5-7",
        "3.6.5-9",
        "3.6.6-1",
        "3.6.6-1ubuntu0.1"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-2708"
    },
    {
      "name": "libsoup",
      "ranges": [],
      "ecosystem": "cpe",
      "fixed_version": "",
      "provider_record_id": "NVD-CVE-2026-2708"
    },
    {
      "name": "enterprise_linux",
      "ranges": [],
      "ecosystem": "cpe",
      "fixed_version": "",
      "provider_record_id": "NVD-CVE-2026-2708"
    }
  ]
}

[Debian bug #1128582]

Publisher notes

[trixie] libsoup3: Minor issue [bookworm] libsoup3: Minor issue [trixie] libsoup2.4: Minor issue [bookworm] libsoup2.4: Minor issue

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[gir1.2-soup-2.4]Unknown
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Affected
  nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Affected
  nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
[gir1.2-soup-3.0]Unknown
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · amd64 · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · arm64 · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
[libsoup2.4-1]Unknown
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Affected
  nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Affected
  nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
[libsoup2.4-common]Unknown
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · all · bookworm
  Affected
  nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
- 2.74.3-1+deb12u1 · all · bookworm
  Affected
  nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
[libsoup2.4-dev]Unknown
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Affected
  nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Affected
  nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
[libsoup2.4-doc]Unknown
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · all · bookworm
  Affected
  nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
- 2.74.3-1+deb12u1 · all · bookworm
  Affected
  nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
[libsoup2.4-tests]Unknown
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Affected
  nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Affected
  nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
[libsoup-3.0-0]Unknown
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · amd64 · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · arm64 · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
[libsoup-3.0-common]Unknown
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · all · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · all · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
[libsoup-3.0-dev]Unknown
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · amd64 · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · arm64 · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
[libsoup-3.0-doc]Unknown
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · all · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · all · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
[libsoup-3.0-tests]Unknown
Source package: [libsoup3]
Details (2)
- 3.2.3-0+deb12u2 · amd64 · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
- 3.2.3-0+deb12u2 · arm64 · bookworm
  Affected
  nvd · libsoup3 · debian · bookworm; nvd · libsoup3 · debian · 12
[libsoup-gnome2.4-1]Unknown
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Affected
  nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Affected
  nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
[libsoup-gnome2.4-dev]Unknown
Source package: [libsoup2.4]
Details (2)
- 2.74.3-1+deb12u1 · amd64 · bookworm
  Affected
  nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12
- 2.74.3-1+deb12u1 · arm64 · bookworm
  Affected
  nvd · libsoup2.4 · debian · bookworm; nvd · libsoup2.4 · debian · 12

[Debian 13 (Trixie)]

[gir1.2-soup-2.4]Unknown
Source package: [libsoup2.4]
Details (2)
- 2.74.3-10.1 · amd64 · trixie
  Affected
  nvd · libsoup2.4 · debian · 13
- 2.74.3-10.1 · arm64 · trixie
  Affected
  nvd · libsoup2.4 · debian · 13
[gir1.2-soup-3.0]Unknown
Source package: [libsoup3]
Details (2)
- 3.6.5-3 · amd64 · trixie
  Affected
  nvd · libsoup3 · debian · 13
- 3.6.5-3 · arm64 · trixie
  Affected
  nvd · libsoup3 · debian · 13
[libsoup-2.4-1]Unknown
Source package: [libsoup2.4]
Details (2)
- 2.74.3-10.1 · amd64 · trixie
  Affected
  nvd · libsoup2.4 · debian · 13
- 2.74.3-10.1 · arm64 · trixie
  Affected
  nvd · libsoup2.4 · debian · 13
[libsoup2.4-common]Unknown
Source package: [libsoup2.4]
Details (2)
- 2.74.3-10.1 · all · trixie
  Affected
  nvd · libsoup2.4 · debian · 13
- 2.74.3-10.1 · all · trixie
  Affected
  nvd · libsoup2.4 · debian · 13
[libsoup2.4-dev]Unknown
Source package: [libsoup2.4]
Details (2)
- 2.74.3-10.1 · amd64 · trixie
  Affected
  nvd · libsoup2.4 · debian · 13
- 2.74.3-10.1 · arm64 · trixie
  Affected
  nvd · libsoup2.4 · debian · 13
[libsoup2.4-doc]Unknown
Source package: [libsoup2.4]
Details (2)
- 2.74.3-10.1 · all · trixie
  Affected
  nvd · libsoup2.4 · debian · 13
- 2.74.3-10.1 · all · trixie
  Affected
  nvd · libsoup2.4 · debian · 13

Next results

Observed: Oct 26, 2026, 9:22:03 PM 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]