Vulnerability-Lookup

CVE-2026-3099 (GCVE-0-2026-3099)

Vulnerability from cvelistv5 – Published: 2026-03-12 13:53 – Updated: 2026-03-23 14:40

Title

Libsoup: libsoup: authentication bypass via digest authentication replay attack

Summary

A flaw was found in Libsoup. The server-side digest authentication implementation in the SoupAuthDomainDigest class does not properly track issued nonces or enforce the required incrementing nonce-count (nc) attribute. This vulnerability allows a remote attacker to capture a single valid authentication header and replay it repeatedly. Consequently, the attacker can bypass authentication and gain unauthorized access to protected resources, impersonating the legitimate user.

Severity ?

5.8 (Medium)


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

CWE

CWE-323 - Reusing a Nonce, Key Pair in Encryption

Assigner

redhat

References

URL

Tags

	https://access.redhat.com/security/cve/CVE-2026-3099	vdb-entryx_refsource_REDHAT
	https://bugzilla.redhat.com/show_bug.cgi?id=2442232	issue-trackingx_refsource_REDHAT
	https://gitlab.gnome.org/GNOME/libsoup/-/issues/495

Impacted products

Vendor

Product

Version

Red Hat

Red Hat Enterprise Linux 10

cpe:/o:redhat:enterprise_linux:10

Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9

Date Public ?

2026-02-24 01:01

Credits

Red Hat would like to thank Cavid for reporting this issue.

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-3099

Vulnerability from fkie_nvd - Published: 2026-03-12 14:16 - Updated: 2026-03-23 14:02

Severity ?

5.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L
7.3 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Summary

References

URL	Tags
secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-3099	Third Party Advisory
secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2442232	Issue Tracking, Third Party Advisory
secalert@redhat.com	https://gitlab.gnome.org/GNOME/libsoup/-/issues/495	Exploit, Issue Tracking, Third Party Advisory

Impacted products

Vendor	Product	Version
gnome	libsoup	-
redhat	enterprise_linux	6.0
redhat	enterprise_linux	7.0
redhat	enterprise_linux	8.0
redhat	enterprise_linux	9.0
redhat	enterprise_linux	10.0

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To clipboard

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      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
  ]
}

GHSA-HRF3-6C7V-5628

Vulnerability from github – Published: 2026-03-12 15:30 – Updated: 2026-03-12 15:30

Details

Severity ?

5.8 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-3099"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-323"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-12T14:16:18Z",
    "severity": "MODERATE"
  },
  "details": "A flaw was found in Libsoup. The server-side digest authentication implementation in the SoupAuthDomainDigest class does not properly track issued nonces or enforce the required incrementing nonce-count (nc) attribute. This vulnerability allows a remote attacker to capture a single valid authentication header and replay it repeatedly. Consequently, the attacker can bypass authentication and gain unauthorized access to protected resources, impersonating the legitimate user.",
  "id": "GHSA-hrf3-6c7v-5628",
  "modified": "2026-03-12T15:30:25Z",
  "published": "2026-03-12T15:30:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3099"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-3099"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442232"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.gnome.org/GNOME/libsoup/-/issues/495"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-3099

Vulnerability from csaf_microsoft - Published: 2026-03-02 00:00 - Updated: 2026-03-31 15:12

Summary

Libsoup: libsoup: authentication bypass via digest authentication replay attack

Notes

Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

CVE-2026-3099

5.8 (Medium)


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

CWE-323 - Reusing a Nonce, Key Pair in Encryption

None Available There is no fix available for this vulnerability as of now

References

URL

Category

	https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self
	https://support.microsoft.com/lifecycle	external
	https://www.first.org/cvss	external
	https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self

JSON

To clipboard

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-3099 Libsoup: libsoup: authentication bypass via digest authentication replay attack - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-3099.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "Libsoup: libsoup: authentication bypass via digest authentication replay attack",
    "tracking": {
      "current_release_date": "2026-03-31T15:12:03.000Z",
      "generator": {
        "date": "2026-04-01T07:38:22.488Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-3099",
      "initial_release_date": "2026-03-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-03-25T01:02:43.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2026-03-31T15:12:03.000Z",
          "legacy_version": "2",
          "number": "2",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              },
              {
                "category": "product_version",
                "name": "2.0",
                "product": {
                  "name": "CBL Mariner 2.0",
                  "product_id": "17086"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "azl3 libsoup 3.4.4-12",
                "product": {
                  "name": "azl3 libsoup 3.4.4-12",
                  "product_id": "3"
                }
              },
              {
                "category": "product_version_range",
                "name": "azl3 libsoup 3.4.4-14",
                "product": {
                  "name": "azl3 libsoup 3.4.4-14",
                  "product_id": "2"
                }
              },
              {
                "category": "product_version_range",
                "name": "cbl2 libsoup 3.0.4-12",
                "product": {
                  "name": "cbl2 libsoup 3.0.4-12",
                  "product_id": "4"
                }
              },
              {
                "category": "product_version_range",
                "name": "cbl2 libsoup 3.0.4-13",
                "product": {
                  "name": "cbl2 libsoup 3.0.4-13",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "libsoup"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 libsoup 3.4.4-12 as a component of Azure Linux 3.0",
          "product_id": "17084-3"
        },
        "product_reference": "3",
        "relates_to_product_reference": "17084"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "azl3 libsoup 3.4.4-14 as a component of Azure Linux 3.0",
          "product_id": "17084-2"
        },
        "product_reference": "2",
        "relates_to_product_reference": "17084"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cbl2 libsoup 3.0.4-12 as a component of CBL Mariner 2.0",
          "product_id": "17086-4"
        },
        "product_reference": "4",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cbl2 libsoup 3.0.4-13 as a component of CBL Mariner 2.0",
          "product_id": "17086-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17086"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-3099",
      "cwe": {
        "id": "CWE-323",
        "name": "Reusing a Nonce, Key Pair in Encryption"
      },
      "notes": [
        {
          "category": "general",
          "text": "redhat",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "known_affected": [
          "17084-3",
          "17084-2",
          "17086-4",
          "17086-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-3099 Libsoup: libsoup: authentication bypass via digest authentication replay attack - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-3099.json"
        }
      ],
      "remediations": [
        {
          "category": "none_available",
          "date": "2026-03-25T01:02:43.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-3"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-03-25T01:02:43.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-2"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-03-25T01:02:43.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17086-4"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-03-25T01:02:43.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17086-1"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "environmentalsScore": 0.0,
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "temporalScore": 5.8,
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L",
            "version": "3.1"
          },
          "products": [
            "17084-3",
            "17084-2",
            "17086-4",
            "17086-1"
          ]
        }
      ],
      "title": "Libsoup: libsoup: authentication bypass via digest authentication replay attack"
    }
  ]
}

Sightings

Author	Source	Type	Date

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

CVE-2026-3099 (GCVE-0-2026-3099)

FKIE_CVE-2026-3099

GHSA-HRF3-6C7V-5628

MSRC_CVE-2026-3099

Tags

Sightings

Nomenclature