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

Vulnerability from cvelistv5 – Published: 2026-01-08 10:00 – Updated: 2026-01-08 14:58
VLAI?
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
CWE
Assigner
References
Impacted products
Vendor Product Version
curl curl Affected: 8.17.0 , ≤ 8.17.0 (semver)
Affected: 8.16.0 , ≤ 8.16.0 (semver)
Affected: 8.15.0 , ≤ 8.15.0 (semver)
Affected: 8.14.1 , ≤ 8.14.1 (semver)
Affected: 8.14.0 , ≤ 8.14.0 (semver)
Affected: 8.13.0 , ≤ 8.13.0 (semver)
Affected: 8.12.1 , ≤ 8.12.1 (semver)
Affected: 8.12.0 , ≤ 8.12.0 (semver)
Affected: 8.11.1 , ≤ 8.11.1 (semver)
Affected: 8.11.0 , ≤ 8.11.0 (semver)
Affected: 8.10.1 , ≤ 8.10.1 (semver)
Affected: 8.10.0 , ≤ 8.10.0 (semver)
Affected: 8.9.1 , ≤ 8.9.1 (semver)
Affected: 8.9.0 , ≤ 8.9.0 (semver)
Affected: 8.8.0 , ≤ 8.8.0 (semver)
Create a notification for this product.
Credits
Stanislav Fort (Aisle Research) Daniel Stenberg
Show details on NVD website
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": [
            {
              "lessThanOrEqual": "8.17.0",
              "status": "affected",
              "version": "8.17.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.16.0",
              "status": "affected",
              "version": "8.16.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.15.0",
              "status": "affected",
              "version": "8.15.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.14.1",
              "status": "affected",
              "version": "8.14.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.14.0",
              "status": "affected",
              "version": "8.14.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.13.0",
              "status": "affected",
              "version": "8.13.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.12.1",
              "status": "affected",
              "version": "8.12.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.12.0",
              "status": "affected",
              "version": "8.12.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.11.1",
              "status": "affected",
              "version": "8.11.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.11.0",
              "status": "affected",
              "version": "8.11.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.10.1",
              "status": "affected",
              "version": "8.10.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.10.0",
              "status": "affected",
              "version": "8.10.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.9.1",
              "status": "affected",
              "version": "8.9.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.9.0",
              "status": "affected",
              "version": "8.9.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.8.0",
              "status": "affected",
              "version": "8.8.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "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": [
            {
              "description": "CWE-295 Improper Certificate Validation",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-08T10:00:25.773Z",
        "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "shortName": "curl"
      },
      "references": [
        {
          "name": "json",
          "url": "https://curl.se/docs/CVE-2025-13034.json"
        },
        {
          "name": "www",
          "url": "https://curl.se/docs/CVE-2025-13034.html"
        }
      ],
      "title": "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": "2026-01-08T14:58:20.565Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-13034",
      "date": "2026-05-23",
      "epss": "0.00012",
      "percentile": "0.01956"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-13034\",\"sourceIdentifier\":\"2499f714-1537-4658-8207-48ae4bb9eae9\",\"published\":\"2026-01-08T10:15:45.407\",\"lastModified\":\"2026-01-20T14:54:02.730\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"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.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N\",\"baseScore\":5.9,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.2,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-295\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"8.8.0\",\"versionEndExcluding\":\"8.18.0\",\"matchCriteriaId\":\"E6152C75-3784-4E17-A770-4585D1FD80C4\"}]}]}],\"references\":[{\"url\":\"https://curl.se/docs/CVE-2025-13034.html\",\"source\":\"2499f714-1537-4658-8207-48ae4bb9eae9\",\"tags\":[\"Vendor Advisory\",\"Patch\"]},{\"url\":\"https://curl.se/docs/CVE-2025-13034.json\",\"source\":\"2499f714-1537-4658-8207-48ae4bb9eae9\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.9, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-13034\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-08T14:56:11.206224Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-295\", \"description\": \"CWE-295 Improper Certificate Validation\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-08T14:57:30.418Z\"}}], \"cna\": {\"title\": \"No QUIC certificate pinning with GnuTLS\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Stanislav Fort (Aisle Research)\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Daniel Stenberg\"}], \"affected\": [{\"vendor\": \"curl\", \"product\": \"curl\", \"versions\": [{\"status\": \"affected\", \"version\": \"8.17.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.17.0\"}, {\"status\": \"affected\", \"version\": \"8.16.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.16.0\"}, {\"status\": \"affected\", \"version\": \"8.15.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.15.0\"}, {\"status\": \"affected\", \"version\": \"8.14.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.14.1\"}, {\"status\": \"affected\", \"version\": \"8.14.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.14.0\"}, {\"status\": \"affected\", \"version\": \"8.13.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.13.0\"}, {\"status\": \"affected\", \"version\": \"8.12.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.12.1\"}, {\"status\": \"affected\", \"version\": \"8.12.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.12.0\"}, {\"status\": \"affected\", \"version\": \"8.11.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.11.1\"}, {\"status\": \"affected\", \"version\": \"8.11.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.11.0\"}, {\"status\": \"affected\", \"version\": \"8.10.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.10.1\"}, {\"status\": \"affected\", \"version\": \"8.10.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.10.0\"}, {\"status\": \"affected\", \"version\": \"8.9.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.9.1\"}, {\"status\": \"affected\", \"version\": \"8.9.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.9.0\"}, {\"status\": \"affected\", \"version\": \"8.8.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.8.0\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://curl.se/docs/CVE-2025-13034.json\", \"name\": \"json\"}, {\"url\": \"https://curl.se/docs/CVE-2025-13034.html\", \"name\": \"www\"}], \"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\": [{\"lang\": \"en\", \"description\": \"CWE-295 Improper Certificate Validation\"}]}], \"providerMetadata\": {\"orgId\": \"2499f714-1537-4658-8207-48ae4bb9eae9\", \"shortName\": \"curl\", \"dateUpdated\": \"2026-01-08T10:00:25.773Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-13034\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-08T14:58:20.565Z\", \"dateReserved\": \"2025-11-11T16:52:22.121Z\", \"assignerOrgId\": \"2499f714-1537-4658-8207-48ae4bb9eae9\", \"datePublished\": \"2026-01-08T10:00:25.773Z\", \"assignerShortName\": \"curl\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.