🛡️ CVE-2022-42916
🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-319 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE CWE-319
Public Exploit ✅ No
Source NVD
Published 2022-10-29
Updated 2026-06-08
Modified 2026-02-13
Fix URL N/A

Affected Packages

Software From version Fixed in
curl 7.77.0 7.86.0
fedora — —
macos 13.0 13.2
universal-forwarder — —

References

Mailing List, Third Party Advisory http://seclists.org/fulldisclosure/2023/Jan/19
Mailing List, Third Party Advisory http://seclists.org/fulldisclosure/2023/Jan/20
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2022/12/21/1
Mailing List, Third Party Advisory http://seclists.org/fulldisclosure/2023/Jan/19
Mailing List, Third Party Advisory http://seclists.org/fulldisclosure/2023/Jan/20
Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2022/12/21/1

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