Vulnerability-Lookup

GHSA-9R76-QJ98-JFHC

Vulnerability from github – Published: 2026-01-08 12:30 – Updated: 2026-01-08 15:31

Details

When using CURLOPT_PINNEDPUBLICKEY option with libcurl or --pinnedpubkey with the curl tool,curl should check the public key of the server certificate to verify the peer.

This check was skipped in a certain condition that would then make curl allow the connection without performing the proper check, thus not noticing a possible impostor. To skip this check, the connection had to be done with QUIC with ngtcp2 built to use GnuTLS and the user had to explicitly disable the standard certificate verification.

Severity

5.9 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-13034"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-08T10:15:45Z",
    "severity": "MODERATE"
  },
  "details": "When using `CURLOPT_PINNEDPUBLICKEY` option with libcurl or `--pinnedpubkey`\nwith the curl tool,curl should check the public key of the server certificate\nto verify the peer.\n\nThis check was skipped in a certain condition that would then make curl allow\nthe connection without performing the proper check, thus not noticing a\npossible impostor. To skip this check, the connection had to be done with QUIC\nwith ngtcp2 built to use GnuTLS and the user had to explicitly disable the\nstandard certificate verification.",
  "id": "GHSA-9r76-qj98-jfhc",
  "modified": "2026-01-08T15:31:25Z",
  "published": "2026-01-08T12:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-13034"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2025-13034.html"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2025-13034.json"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-13034 (GCVE-0-2025-13034)

Vulnerability from cvelistv5 – Published: 2026-01-08 10:00 – Updated: 2026-09-15 06:02

Title

No QUIC certificate pinning with GnuTLS

Summary

When using `CURLOPT_PINNEDPUBLICKEY` option with libcurl or `--pinnedpubkey` with the curl tool, curl should check the public key of the server certificate to verify the peer. This check was skipped in a certain condition that would then make curl allow the connection without performing the proper check, thus not noticing a possible impostor. To skip this check, the connection had to be done with QUIC with ngtcp2 built to use GnuTLS and the user had to explicitly disable the standard certificate verification.

Severity

5.9 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-08 14:56 UTC

CWE

CWE-295 - Improper Certificate Validation

Assigner

curl redhat root

References

2 references

URL	Tags
https://curl.se/docs/CVE-2025-13034.json
https://curl.se/docs/CVE-2025-13034.html

Impacted products

3 products

Vendor	Product	Version
curl	curl	Affected: 8.8.0 , < 8.14.2 (semver) Affected: 8.15.0 , < 8.16.1 (semver) Affected: 8.17.0 , < 8.18.0 (semver)
curl	curl	Affected: 3210101088dfa3d6a125d213226b092f2f866722 , < 3d91ca8cdb3b434226e743946d428b4dd3acf2c9 (git)
curl	curl	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

Credits

Stanislav Fort (Aisle Research) Daniel Stenberg

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.9,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-13034",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-08T14:56:11.206224Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-295",
                "description": "CWE-295 Improper Certificate Validation",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-08T14:58:20.565Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "curl",
          "vendor": "curl",
          "versions": [
            {
              "lessThan": "8.14.2",
              "status": "affected",
              "version": "8.8.0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.16.1",
              "status": "affected",
              "version": "8.15.0",
              "versionType": "semver"
            },
            {
              "lessThan": "8.18.0",
              "status": "affected",
              "version": "8.17.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "curl",
          "repo": "https://github.com/curl/curl.git",
          "vendor": "curl",
          "versions": [
            {
              "lessThan": "3d91ca8cdb3b434226e743946d428b4dd3acf2c9",
              "status": "affected",
              "version": "3210101088dfa3d6a125d213226b092f2f866722",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "curl",
          "vendor": "curl",
          "versions": [
            {
              "status": "affected",
              "version": "8.17.0"
            },
            {
              "status": "affected",
              "version": "8.16.0"
            },
            {
              "status": "affected",
              "version": "8.15.0"
            },
            {
              "status": "affected",
              "version": "8.14.1"
            },
            {
              "status": "affected",
              "version": "8.14.0"
            },
            {
              "status": "affected",
              "version": "8.13.0"
            },
            {
              "status": "affected",
              "version": "8.12.1"
            },
            {
              "status": "affected",
              "version": "8.12.0"
            },
            {
              "status": "affected",
              "version": "8.11.1"
            },
            {
              "status": "affected",
              "version": "8.11.0"
            },
            {
              "status": "affected",
              "version": "8.10.1"
            },
            {
              "status": "affected",
              "version": "8.10.0"
            },
            {
              "status": "affected",
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            },
            {
              "status": "affected",
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            },
            {
              "status": "affected",
              "version": "8.8.0"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Stanislav Fort (Aisle Research)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Daniel Stenberg"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "When using `CURLOPT_PINNEDPUBLICKEY` option with libcurl or `--pinnedpubkey`\nwith the curl tool, curl should check the public key of the server certificate\nto verify the peer.\n\nThis check was skipped in a certain condition that would then make curl allow\nthe connection without performing the proper check, thus not noticing a\npossible impostor. To skip this check, the connection had to be done with QUIC\nwith ngtcp2 built to use GnuTLS and the user had to explicitly disable the\nstandard certificate verification."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-295",
              "description": "Improper Certificate Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-15T06:02:26.327Z",
        "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "shortName": "curl"
      },
      "references": [
        {
          "url": "https://curl.se/docs/CVE-2025-13034.json"
        },
        {
          "url": "https://curl.se/docs/CVE-2025-13034.html"
        }
      ],
      "title": "No QUIC certificate pinning with GnuTLS",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_osv": {
        "affected": [
          {
            "ranges": [
              {
                "events": [
                  {
                    "introduced": "8.8.0"
                  },
                  {
                    "fixed": "8.14.2"
                  },
                  {
                    "introduced": "8.15.0"
                  },
                  {
                    "fixed": "8.16.1"
                  },
                  {
                    "introduced": "8.17.0"
                  },
                  {
                    "fixed": "8.18.0"
                  }
                ],
                "type": "SEMVER"
              },
              {
                "events": [
                  {
                    "introduced": "3210101088dfa3d6a125d213226b092f2f866722"
                  },
                  {
                    "fixed": "3d91ca8cdb3b434226e743946d428b4dd3acf2c9"
                  }
                ],
                "repo": "https://github.com/curl/curl.git",
                "type": "GIT"
              }
            ],
            "versions": [
              "8.17.0",
              "8.16.0",
              "8.15.0",
              "8.14.1",
              "8.14.0",
              "8.13.0",
              "8.12.1",
              "8.12.0",
              "8.11.1",
              "8.11.0",
              "8.10.1",
              "8.10.0",
              "8.9.1",
              "8.9.0",
              "8.8.0"
            ]
          }
        ],
        "aliases": [
          "CVE-2025-13034"
        ],
        "credits": [
          {
            "name": "Stanislav Fort (Aisle Research)",
            "type": "finder"
          },
          {
            "name": "Daniel Stenberg",
            "type": "remediation developer"
          }
        ],
        "database_specific": {
          "CWE": {
            "desc": "Improper Certificate Validation",
            "id": "CWE-295"
          },
          "URL": "https://curl.se/docs/CVE-2025-13034.json",
          "affects": "both",
          "award": {
            "amount": "2540",
            "currency": "USD"
          },
          "last_affected": "8.17.0",
          "package": "curl",
          "severity": "Medium",
          "www": "https://curl.se/docs/CVE-2025-13034.html"
        },
        "details": "When using `CURLOPT_PINNEDPUBLICKEY` option with libcurl or `--pinnedpubkey`\nwith the curl tool, curl should check the public key of the server certificate\nto verify the peer.\n\nThis check was skipped in a certain condition that would then make curl allow\nthe connection without performing the proper check, thus not noticing a\npossible impostor. To skip this check, the connection had to be done with QUIC\nwith ngtcp2 built to use GnuTLS and the user had to explicitly disable the\nstandard certificate verification.",
        "id": "CURL-CVE-2025-13034",
        "modified": "2026-09-07T10:34:51.00Z",
        "published": "2026-01-07T08:00:00.00Z",
        "schema_version": "1.5.0",
        "summary": "No QUIC certificate pinning with GnuTLS"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
    "assignerShortName": "curl",
    "cveId": "CVE-2025-13034",
    "datePublished": "2026-01-08T10:00:25.773Z",
    "dateReserved": "2025-11-11T16:52:22.121Z",
    "dateUpdated": "2026-09-15T06:02:26.327Z",
    "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.