Vulnerability-Lookup

GHSA-R8J3-CWJ5-4J73

Vulnerability from github – Published: 2026-09-06 18:34 – Updated: 2026-09-08 21:33

Details

A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup for a given hostname even when using a different Native CA Store setting (CURLSSLOPT_NATIVE_CA) than when the connection was created.

Severity

7.5 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80231"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-488"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-06T18:17:22Z",
    "severity": "HIGH"
  },
  "details": "A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup\nfor a given hostname even when using a different Native CA Store setting\n(`CURLSSLOPT_NATIVE_CA`) than when the connection was created.",
  "id": "GHSA-r8j3-cwj5-4j73",
  "modified": "2026-09-08T21:33:03Z",
  "published": "2026-09-06T18:34:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80231"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/3969368"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2026-80231.html"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2026-80231.json"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-80231 (GCVE-0-2026-80231)

Vulnerability from cvelistv5 – Published: 2026-09-06 17:48 – Updated: 2026-09-15 06:03

Title

native CA store conn reuse

Summary

A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup for a given hostname even when using a different Native CA Store setting (`CURLSSLOPT_NATIVE_CA`) than when the connection was created.

Severity

7.5 (High)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-08 18:50 UTC

CWE

CWE-488 - Exposure of Data Element to Wrong Session

Assigner

curl redhat root

References

3 references

URL	Tags
https://curl.se/docs/CVE-2026-80231.json
https://curl.se/docs/CVE-2026-80231.html
https://hackerone.com/reports/3969368

Impacted products

3 products

Vendor	Product	Version
curl	curl	Affected: 7.71.0 , < 8.14.2 (semver) Affected: 8.15.0 , < 8.16.1 (semver) Affected: 8.17.0 , < 8.20.1 (semver) Affected: 8.21.0 , < 8.22.0 (semver)
curl	curl	Affected: 148534db57dda611cf8516e92e4d6e35fc1e5074 , < 7be1e70cb6bcd83e130ecfe8cb91b6a7dcdeff42 (git)
curl	curl	Affected: 8.21.0 Affected: 8.20.0 Affected: 8.19.0 Affected: 8.18.0 Affected: 8.17.0 Affected: 8.16.0 Affected: 8.15.0 Affected: 8.14.1 Affected: 8.14.0 Affected: 8.13.0 Affected: 8.12.1 Affected: 8.12.0 Affected: 8.11.1 Affected: 8.11.0 Affected: 8.10.1 Affected: 8.10.0 Affected: 8.9.1 Affected: 8.9.0 Affected: 8.8.0 Affected: 8.7.1 Affected: 8.7.0 Affected: 8.6.0 Affected: 8.5.0 Affected: 8.4.0 Affected: 8.3.0 Affected: 8.2.1 Affected: 8.2.0 Affected: 8.1.2 Affected: 8.1.1 Affected: 8.1.0 Affected: 8.0.1 Affected: 8.0.0 Affected: 7.88.1 Affected: 7.88.0 Affected: 7.87.0 Affected: 7.86.0 Affected: 7.85.0 Affected: 7.84.0 Affected: 7.83.1 Affected: 7.83.0 Affected: 7.82.0 Affected: 7.81.0 Affected: 7.80.0 Affected: 7.79.1 Affected: 7.79.0 Affected: 7.78.0 Affected: 7.77.0 Affected: 7.76.1 Affected: 7.76.0 Affected: 7.75.0 Affected: 7.74.0 Affected: 7.73.0 Affected: 7.72.0 Affected: 7.71.1 Affected: 7.71.0

Credits

Stanislav Fort (Aisle Research) Daniel Stenberg

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-80231",
                "options": [
                  {
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                  },
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                  },
                  {
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-08T18:50:09.901920Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-488",
                "description": "CWE-488 Exposure of Data Element to Wrong Session",
                "lang": "en",
                "type": "CWE"
              }
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          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-08T18:51:07.952Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://hackerone.com/reports/3969368"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
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            {
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            },
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            {
              "status": "affected",
              "version": "7.87.0"
            },
            {
              "status": "affected",
              "version": "7.86.0"
            },
            {
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              "version": "7.85.0"
            },
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              "version": "7.83.1"
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          "value": "Stanislav Fort (Aisle Research)"
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        }
      ],
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        }
      ],
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-15T06:03:11.962Z",
        "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
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        },
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          "url": "https://hackerone.com/reports/3969368"
        }
      ],
      "title": "native CA store conn reuse",
      "x_generator": {
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      },
      "x_osv": {
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          {
            "ranges": [
              {
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          "www": "https://curl.se/docs/CVE-2026-80231.html"
        },
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        "id": "CURL-CVE-2026-80231",
        "modified": "2026-09-07T10:34:51.00Z",
        "published": "2026-09-02T08:00:00.00Z",
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    "dateReserved": "2026-08-26T04:24:27.361Z",
    "dateUpdated": "2026-09-15T06:03:11.962Z",
    "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.

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.