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Security advisory

Type: advisorySources: OSVCVE: CVE-2017-7468

In curl and libcurl 7.52.0 to and including 7.53.1, libcurl would attempt to resume a TLS session even if the client certificate had changed. That is unacceptable since a server by specification is allowed to skip the client certificate check on resume, and may instead use the old identity which was established by the previous certificate (or no certificate). libcurl supports by default the use of TLS session id/ticket to resume previous TLS sessions to speed up subsequent TLS handshakes. They are used when for any reason an existing TLS connection couldn't be kept alive to make the next handshake faster. This flaw is a regression and identical to CVE-2016-5419 reported on August 3rd 2016, but affecting a different version range.

Products
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Affected versions
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Fixed versions
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CVEs
CVE-2017-7468
Confirmed fixed CVEs
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Updated in this feed
1 Nov 2026, 07:53 UTC · Revision 1

Source evidence

CVE-2017-7468

core-osv · Original source

Published 16 Jul 2018, 13:29 UTC

In curl and libcurl 7.52.0 to and including 7.53.1, libcurl would attempt to resume a TLS session even if the client certificate had changed. That is unacceptable since a server by specification is allowed to skip the client certificate check on resume, and may instead use the old identity which was established by the previous certificate (or no certificate). libcurl supports by default the use of TLS session id/ticket to resume previous TLS sessions to speed up subsequent TLS handshakes. They are used when for any reason an existing TLS connection couldn't be kept alive to make the next handshake faster. This flaw is a regression and identical to CVE-2016-5419 reported on August 3rd 2016, but affecting a different version range.

osv:CVE-2017-7468
Complete source record
{
  "id": "8e3ec4763ca8ff209f92148ab5a118f885f09b70c0c24039346b05ccf9b9afcd",
  "url": "https://osv.dev/vulnerability/CVE-2017-7468",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2017-7468",
    "summary": "In curl and libcurl 7.52.0 to and including 7.53.1, libcurl would attempt to resume a TLS session even if the client certificate had changed. That is unacceptable since a server by specification is allowed to skip the client certificate check on resume, and may instead use the old identity which was established by the previous certificate (or no certificate). libcurl supports by default the use of TLS session id/ticket to resume previous TLS sessions to speed up subsequent TLS handshakes. They are used when for any reason an existing TLS connection couldn't be kept alive to make the next handshake faster. This flaw is a regression and identical to CVE-2016-5419 reported on August 3rd 2016, but affecting a different version range.",
    "evidence": "osv:CVE-2017-7468",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2017-7468",
      "aliases": [
        "CURL-CVE-2017-7468",
        "CVE-2017-7468"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/curl/curl",
              "type": "GIT",
              "events": [
                {
                  "introduced": "95c717bbd9c327c38b4efcc37d5cda29b8ee2a36"
                },
                {
                  "last_affected": "25df50aa3392ecdbf2b8256b93b30558e8b3a810"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "7.52.0"
                      },
                      {
                        "last_affected": "7.53.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "curl-7_53_1",
            "curl-7_53_0",
            "curl-7_52_1",
            "curl-7_52_0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-7468.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:59.867601068Z",
      "provider": "osv",
      "references": [
        "https://curl.haxx.se/docs/adv_20170419.html",
        "https://security.gentoo.org/glsa/201709-14",
        "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7468"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2017-7468",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 439413,
  "published_at": "2018-07-16T13:29:00.287+00:00"
}