Vulnerability-Lookup

CVE-2026-94083 (GCVE-0-2026-94083)

Vulnerability from cvelistv5 – Published: 2026-09-20 01:18 – Updated: 2026-09-20 01:18

Summary

Suricata before 8.0.7 has a DoH2 type confusion that can cause an invalid free, because cleanup code for the HTTP2 state is executed even though the actual state is HTTP1 (when there is a DoH2 request with an HTTP1 to HTTP2 upgrade). This requires app-layer.protocols.doh2 to be enabled, which is the default in 8.x versions.

Severity

9.4 (Critical)


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

CWE

CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')

Assigner

mitre mitre root

References

3 references

URL	Tags
https://forum.suricata.io/t/suricata-8-0-7-releas…
https://github.com/OISF/suricata/commit/e574009ad…
https://github.com/OISF/suricata/compare/suricata…

Impacted products

1 product

Vendor	Product	Version	CPE status
OISF	Suricata	Affected: 8.0.0 , < 8.0.7 (semver) cpe:2.3:a:oisf:suricata::::::::

Show details on NVD website

JSON

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        {
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          "vendor": "OISF",
          "versions": [
            {
              "lessThan": "8.0.7",
              "status": "affected",
              "version": "8.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "8.0.7",
                  "versionStartIncluding": "8.0.0",
                  "vulnerable": true
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 9.4,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
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            "privilegesRequired": "NONE",
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            }
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        {
          "url": "https://github.com/OISF/suricata/commit/e574009add9c208f319e1d9d15b3bb1229c88074"
        },
        {
          "url": "https://github.com/OISF/suricata/compare/suricata-8.0.6...suricata-8.0.7"
        }
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    "cveId": "CVE-2026-94083",
    "datePublished": "2026-09-20T01:18:05.744Z",
    "dateReserved": "2026-09-20T01:18:05.348Z",
    "dateUpdated": "2026-09-20T01:18:05.744Z",
    "state": "PUBLISHED"
  },
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    },
    "nvd": {
      "cve": {
        "affected": [
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            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Suricata",
                "vendor": "OISF",
                "versions": [
                  {
                    "lessThan": "8.0.7",
                    "status": "affected",
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                    "versionType": "semver"
                  }
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        "descriptions": [
          {
            "lang": "en",
            "value": "Suricata before 8.0.7 has a DoH2 type confusion that can cause an invalid free, because cleanup code for the HTTP2 state is executed even though the actual state is HTTP1 (when there is a DoH2 request with an HTTP1 to HTTP2 upgrade). This requires app-layer.protocols.doh2 to be enabled, which is the default in 8.x versions."
          }
        ],
        "id": "CVE-2026-94083",
        "lastModified": "2026-09-20T02:16:53.520",
        "metrics": {
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                "attackComplexity": "LOW",
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                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
                "version": "3.1"
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          },
          {
            "source": "cve@mitre.org",
            "url": "https://github.com/OISF/suricata/commit/e574009add9c208f319e1d9d15b3bb1229c88074"
          },
          {
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          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Received",
        "weaknesses": [
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              {
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            ],
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            "type": "Primary"
          }
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    }
  }
}

GHSA-4WWF-734G-MQM8

Vulnerability from github – Published: 2026-09-20 03:30 – Updated: 2026-09-20 03:30

Details

Severity

9.4 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-94083"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-843"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-20T02:16:53Z",
    "severity": "CRITICAL"
  },
  "details": "Suricata before 8.0.7 has a DoH2 type confusion that can cause an invalid free, because cleanup code for the HTTP2 state is executed even though the actual state is HTTP1 (when there is a DoH2 request with an HTTP1 to HTTP2 upgrade). This requires app-layer.protocols.doh2 to be enabled, which is the default in 8.x versions.",
  "id": "GHSA-4wwf-734g-mqm8",
  "modified": "2026-09-20T03:30:27Z",
  "published": "2026-09-20T03:30:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-94083"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OISF/suricata/commit/e574009add9c208f319e1d9d15b3bb1229c88074"
    },
    {
      "type": "WEB",
      "url": "https://forum.suricata.io/t/suricata-8-0-7-released/6467"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OISF/suricata/compare/suricata-8.0.6...suricata-8.0.7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
      "type": "CVSS_V3"
    }
  ]
}

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.

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.

Related by attack behaviour

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.