Dashboard / CVE-2022-43552

CVE-2022-43552

MEDIUM
MEDIUM Priority: 0.16 BB Relevance: 62/100
Published: 2023-02-09 Modified: 2026-10-23 First seen: 2026-10-29 Status: active

Attack Surface

Network No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: High
PR: None
UI: None
S: Unchanged
C: None
I: None
A: High

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.

Weakness Classification (1)

Affected Software (4)

VendorProductVersion
apple macos 13.0 – 13.3
haxx curl < 7.87.0
splunk universal_forwarder 8.2.0 – 8.2.12
splunk universal_forwarder 9.1.0

References & Advisories (7)

http://seclists.org/fulldisclosure/2023/Mar/17
Mailing List Third Party Advisory
https://hackerone.com/reports/1764858
Exploit Issue Tracking Third Party Advisory

Bug Bounty Relevance

62 / 100
✓ Network accessible
✓ No authentication
✓ No user interaction

CVSS Score

5.9 / 10.0 v3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

2.71%
Raw Score 0.027140
Percentile 86.0%
Date 2026-10-29

EPSS Trend

2026-10-29
0.02714
2026-10-28
0.02714

Intelligence Sources

nvd ref →

External Links