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.

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Advisories
Source ID Title
Ubuntu USN Ubuntu USN USN-5702-1 curl vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 13 Feb 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-02-13T19:48:21.552Z

Reserved: 2022-10-13T00:00:00.000Z

Link: CVE-2022-42916

cve-icon Vulnrichment

Updated: 2024-08-03T13:19:05.420Z

cve-icon NVD

Status : Modified

Published: 2022-10-29T02:15:09.047

Modified: 2026-02-13T20:16:13.750

Link: CVE-2022-42916

cve-icon Redhat

Severity : Moderate

Publid Date: 2022-10-26T00:00:00Z

Links: CVE-2022-42916 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses