Vulnerability-Lookup

ubuntu-cve-2026-12478

Vulnerability from osv_ubuntu

Published

2026-07-14 10:16

Modified

2026-07-14 10:16

Summary

Details

The fix for CVE-2026-0716 (commit 6ff7ef0, libsoup 3.6.6) placed the integer overflow guard inside the if (masked) block, leaving unmasked server-to-client frames unprotected. A malicious WebSocket server can send a crafted unmasked frame with a payload length near UINT64_MAX to trigger an OOB read in a libsoup-based client when max_incoming_payload_size is set to 0.

Severity

4.8 (Medium)


                    
                      CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-12478	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-12478	REPORT
	https://access.redhat.com/security/cve/CVE-2026-12478	REPORT
	https://access.redhat.com/security/cve/cve-2026-0716	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2489655	REPORT
	https://gitlab.gnome.org/GNOME/libsoup/-/merge_re…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gir1.2-soup-3.0",
            "binary_version": "3.0.7-0ubuntu1+esm7"
          },
          {
            "binary_name": "libsoup-3.0-0",
            "binary_version": "3.0.7-0ubuntu1+esm7"
          },
          {
            "binary_name": "libsoup-3.0-common",
            "binary_version": "3.0.7-0ubuntu1+esm7"
          },
          {
            "binary_name": "libsoup-3.0-tests",
            "binary_version": "3.0.7-0ubuntu1+esm7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "libsoup3",
        "purl": "pkg:deb/ubuntu/libsoup3@3.0.7-0ubuntu1+esm7?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gir1.2-soup-3.0",
            "binary_version": "3.4.4-5ubuntu0.7"
          },
          {
            "binary_name": "libsoup-3.0-0",
            "binary_version": "3.4.4-5ubuntu0.7"
          },
          {
            "binary_name": "libsoup-3.0-common",
            "binary_version": "3.4.4-5ubuntu0.7"
          },
          {
            "binary_name": "libsoup-3.0-tests",
            "binary_version": "3.4.4-5ubuntu0.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libsoup3",
        "purl": "pkg:deb/ubuntu/libsoup3@3.4.4-5ubuntu0.7?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gir1.2-soup-3.0",
            "binary_version": "3.6.6-1"
          },
          {
            "binary_name": "libsoup-3.0-0",
            "binary_version": "3.6.6-1"
          },
          {
            "binary_name": "libsoup-3.0-common",
            "binary_version": "3.6.6-1"
          },
          {
            "binary_name": "libsoup-3.0-tests",
            "binary_version": "3.6.6-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libsoup3",
        "purl": "pkg:deb/ubuntu/libsoup3@3.6.6-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    }
  ],
  "aliases": [],
  "details": "The fix for CVE-2026-0716 (commit 6ff7ef0, libsoup 3.6.6) placed the integer overflow guard inside the if (masked) block, leaving unmasked server-to-client frames unprotected. A malicious WebSocket server can send a crafted unmasked frame with a payload length near UINT64_MAX to trigger an OOB read in a libsoup-based client when max_incoming_payload_size is set to\u00a00.",
  "id": "UBUNTU-CVE-2026-12478",
  "modified": "2026-07-14T10:16:00Z",
  "published": "2026-07-14T10:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-12478"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-12478"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-12478"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/cve-2026-0716"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2489655"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/518"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-12478"
  ]
}

CVE-2026-12478 (GCVE-0-2026-12478)

Vulnerability from cvelistv5 – Published: 2026-07-14 09:26 – Updated: 2026-07-15 14:42

Title

Libsoup: incomplete fix for cve-2026-0716: out-of-bounds read in libsoup websocket frame processing (unmasked path)

Summary

Severity

4.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-125 - Out-of-bounds Read

Assigner

redhat

References

4 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-12478	vdb-entryx_refsource_REDHAT
https://access.redhat.com/security/cve/cve-2026-0716	technical-descriptionx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2489655	issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/libsoup/-/merge_re…

Impacted products

1 product

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10

Date Public

2026-04-27 00:00

Credits

Red Hat would like to thank Adel Bouachraoui and Gerard Capdevila for reporting this issue.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-12478",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-15T14:42:08.156943Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-15T14:42:55.698Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
          ],
          "defaultStatus": "affected",
          "packageName": "libsoup3",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Red Hat would like to thank Adel Bouachraoui and Gerard Capdevila for reporting this issue."
        }
      ],
      "datePublic": "2026-04-27T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The fix for CVE-2026-0716 (commit 6ff7ef0, libsoup 3.6.6) placed the integer overflow guard inside the if (masked) block, leaving unmasked server-to-client frames unprotected. A malicious WebSocket server can send a crafted unmasked frame with a payload length near UINT64_MAX to trigger an OOB read in a libsoup-based client when max_incoming_payload_size is set to\u00a00."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "namespace": "https://access.redhat.com/security/updates/classification/",
              "value": "Moderate"
            },
            "type": "Red Hat severity rating"
          }
        },
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-14T10:06:16.621Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
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      "references": [
        {
          "tags": [
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            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-12478"
        },
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          "tags": [
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            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/cve-2026-0716"
        },
        {
          "name": "RHBZ#2489655",
          "tags": [
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            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2489655"
        },
        {
          "url": "https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/518"
        }
      ],
      "timeline": [
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          "lang": "en",
          "time": "2026-06-16T21:33:08.458Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-04-27T00:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Libsoup: incomplete fix for cve-2026-0716: out-of-bounds read in libsoup websocket frame processing (unmasked path)",
      "workarounds": [
        {
          "lang": "en",
          "value": "To mitigate this issue, applications utilizing libsoup\u0027s WebSocket support should ensure that the `max_incoming_payload_size` is explicitly set to a non-zero value. This prevents the library from processing WebSocket frames with an unset or zero maximum payload size, which can lead to out-of-bounds reads. Consult application-specific documentation for configuring libsoup parameters."
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-125: Out-of-bounds Read"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-12478",
    "datePublished": "2026-07-14T09:26:19.184Z",
    "dateReserved": "2026-06-16T21:25:02.817Z",
    "dateUpdated": "2026-07-15T14:42:55.698Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

ubuntu-cve-2026-12478

Vulnerability from osv_ubuntu

CVE-2026-12478 (GCVE-0-2026-12478)

Tags

Sightings

Nomenclature