Vulnerability-Lookup

CVE-2026-45084 (GCVE-0-2026-45084)

Vulnerability from cvelistv5 – Published: 2026-08-04 21:23 – Updated: 2026-08-05 14:16

Title

OpenSIPS: Denial of service in presence.handle_publish() from unchecked Content-Type state

Summary

OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Versions 3.4.0 through 3.6.5 contain a denial of service vulnerability in the presence module. When the presence module's handle_publish() function processes a SIP PUBLISH request with an Event: presence header and a message body while the configuration option enable_sphere_check=1 is set, it invokes the get_content_type() macro without first calling parse_content_type_hdr(), causing it to dereference uninitialized or NULL Content-Type parsing state and crash. If a Content-Type header is present but unparsed, msg->content_type->parsed is NULL and is dereferenced as a content_t pointer; if the request lacks a Content-Type header entirely, msg->content_type itself is NULL, and both cases lead to a crash. A remote attacker can therefore cause a denial of service against an affected instance with a single PUBLISH request over UDP or TCP, using either a valid Content-Type: application/pidf+xml request or one with the header removed, and the vulnerable code path itself does not enforce authentication (though a deployment's routing configuration may require it before this route is reached). The issue has been fixed in version 3.6.6 and 4.0.0-rc1.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-05 14:15 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/OpenSIPS/opensips/security/adv…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
OpenSIPS	opensips	Affected: >= 3.4.0, < 3.6.6 Affected: >= 4.0.0-beta, < 4.0.0-rc1	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-45084

Vulnerability from fkie_nvd - Published: 2026-08-04 22:17 - Updated: 2026-09-08 20:41

Severity

8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/OpenSIPS/opensips/security/advisories/GHSA-h3ww-hchh-x2g9
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/OpenSIPS/opensips/security/advisories/GHSA-h3ww-hchh-x2g9

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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    }
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    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

UBUNTU-CVE-2026-45084 (CVE-2026-45084)

Vulnerability from osv_ubuntu – Published: 2026-08-04 22:17 – Updated: 2026-08-04 22:17 – Source website

Details

Severity

8.7 (High)


                    
                      CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-45084	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-45084	REPORT
	https://github.com/OpenSIPS/opensips/security/adv…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "opensips",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-b2bua-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-berkeley-bin",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-berkeley-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-carrierroute-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-compression-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-console",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-cpl-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-dbhttp-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-dialplan-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-emergency-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-geoip-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-http-modules",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-identity-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-jabber-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-json-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-ldap-modules",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-lua-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-memcached-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-mysql-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-perl-modules",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-postgres-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-presence-modules",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-rabbitmq-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-radius-modules",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-redis-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-regex-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-restclient-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-sctp-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-snmpstats-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-sqlite-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-tls-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-tlsmgm-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-unixodbc-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-wss-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-xmlrpc-module",
            "binary_version": "2.2.2-3build4"
          },
          {
            "binary_name": "opensips-xmpp-module",
            "binary_version": "2.2.2-3build4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "opensips",
        "purl": "pkg:deb/ubuntu/opensips@2.2.2-3build4?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.2.2-3build2",
        "2.2.2-3build3",
        "2.2.2-3build4"
      ]
    }
  ],
  "aliases": [],
  "details": "OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Versions 3.4.0 through 3.6.5 contain a denial of service vulnerability in the presence module. When the presence module\u0027s handle_publish() function processes a SIP PUBLISH request with an Event: presence header and a message body while the configuration option enable_sphere_check=1 is set, it invokes the get_content_type() macro without first calling parse_content_type_hdr(), causing it to dereference uninitialized or NULL Content-Type parsing state and crash. If a Content-Type header is present but unparsed, msg-\u003econtent_type-\u003eparsed is NULL and is dereferenced as a content_t pointer; if the request lacks a Content-Type header entirely, msg-\u003econtent_type itself is NULL, and both cases lead to a crash. A remote attacker can therefore cause a denial of service against an affected instance with a single PUBLISH request over UDP or TCP, using either a valid Content-Type: application/pidf+xml request or one with the header removed, and the vulnerable code path itself does not enforce authentication (though a deployment\u0027s routing configuration may require it before this route is reached). The issue has been fixed in version 3.6.6 and 4.0.0-rc1.",
  "id": "UBUNTU-CVE-2026-45084",
  "modified": "2026-08-04T22:17:00Z",
  "published": "2026-08-04T22:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-45084"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-45084"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/OpenSIPS/opensips/security/advisories/GHSA-h3ww-hchh-x2g9"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-45084"
  ]
}

Sightings

Author	Source	Type	Date	Other

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-45084 (GCVE-0-2026-45084)

FKIE_CVE-2026-45084

UBUNTU-CVE-2026-45084 (CVE-2026-45084)

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