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.
Project Subscriptions
Advisories
| Source | ID | Title |
|---|---|---|
Ubuntu USN |
USN-5702-1 | curl vulnerabilities |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Fri, 13 Feb 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Projects
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Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-02-13T19:48:21.552Z
Reserved: 2022-10-13T00:00:00.000Z
Link: CVE-2022-42916
Updated: 2024-08-03T13:19:05.420Z
Status : Modified
Published: 2022-10-29T02:15:09.047
Modified: 2026-02-13T20:16:13.750
Link: CVE-2022-42916
OpenCVE Enrichment
No data.
Weaknesses
Ubuntu USN