CVE-2022-43552

Name: CVE-2022-43552
Creator: NVD / NIST
Published: 2023-02-09T20:15:10.95+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 2.51%

Last modified Jun 17, 2026

CVE-2022-43552 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. A use after free vulnerability exists in curl <7.87.0. Curl can be asked to *tunnel* virtually all protocols it supports through an HTTP proxy. EPSS estimates a 2.51% chance of exploitation in the next 30 days.

Description

A use after free vulnerability exists in curl <7.87.0. Curl can be asked to *tunnel* virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

Metrics

CVSS 3.1

5.9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.51%

82.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Haxx	Curl	< 7.87.0
Apple	Macos	>= 13.0, < 13.3
Splunk	Universal Forwarder	>= 8.2.0, < 8.2.12
Splunk	Universal Forwarder	>= 9.0.0, < 9.0.6
Splunk	Universal Forwarder	9.1.0

References

http://seclists.org/fulldisclosure/2023/Mar/17Mailing List, Third Party Advisory
https://hackerone.com/reports/1764858Exploit, Issue Tracking, Third Party Advisory
https://security.gentoo.org/glsa/202310-12Third Party Advisory
https://security.netapp.com/advisory/ntap-20230214-0002/Vendor Advisory
https://support.apple.com/kb/HT213670Third Party Advisory
http://seclists.org/fulldisclosure/2023/Mar/17Mailing List, Third Party Advisory
https://hackerone.com/reports/1764858Exploit, Issue Tracking, Third Party Advisory
https://security.gentoo.org/glsa/202310-12Third Party Advisory
https://security.netapp.com/advisory/ntap-20230214-0002/Vendor Advisory
https://support.apple.com/kb/HT213670Third Party Advisory

Timeline

Published: Feb 9, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-43552?

How severe is CVE-2022-43552?

CVE-2022-43552 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 2.51% probability of exploitation in the next 30 days.

How do I fix CVE-2022-43552?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-43552?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST