HighFix available

curl — security advisory

Type: advisorySources: OSVAdvisory ID: DEBIAN-CVE-2022-42916

In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.

Products: curl
Affected versions: Not specified
Fixed versions: 7.86.0-1
CVEs: CVE-2022-42916
Confirmed fixed CVEs: Not specified
Updated in this feed: 30 Oct 2026, 16:23 UTC · Revision 1

Source evidence

DEBIAN-CVE-2022-42916

core-osv · Original source

Published 29 Oct 2022, 02:15 UTC

osv:DEBIAN-CVE-2022-42916

curl

Fixed versions: 7.86.0-1

curl

Fixed versions: 7.86.0-1

curl

Fixed versions: 7.86.0-1

Complete source record

{
  "id": "6e3c145e08e3b8d720fe0e0908ad149f15659374e0e47894a260d8f6c105db7b",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2022-42916",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2022-42916",
    "summary": "In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.",
    "evidence": "osv:DEBIAN-CVE-2022-42916",
    "products": [
      {
        "name": {
          "value": "curl",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.86.0-1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "curl",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.86.0-1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "curl",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.86.0-1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "DEBIAN-CVE-2022-42916",
      "aliases": [
        "DEBIAN-CVE-2022-42916"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "7.86.0-1"
                }
              ]
            }
          ],
          "package": {
            "name": "curl",
            "purl": "pkg:deb/debian/curl?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-42916.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "7.86.0-1"
                }
              ]
            }
          ],
          "package": {
            "name": "curl",
            "purl": "pkg:deb/debian/curl?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-42916.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "7.86.0-1"
                }
              ]
            }
          ],
          "package": {
            "name": "curl",
            "purl": "pkg:deb/debian/curl?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-42916.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-15T09:47:32.204218613Z",
      "provider": "osv",
      "upstream": [
        "CVE-2022-42916"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2022-42916"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2022-42916",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 327635,
  "published_at": "2022-10-29T02:15:09.047+00:00"
}