Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2022-43552

CVE-2022-43552MEDIUM

n/a https://github.com/curl/curl — A use after free vulnerability exists in curl <7.87.0.

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   N   N  U  N  N  H    5.9   .0271   85.8     —

AFFECTED
  Product                       Versions                Fixed
  https://github.com/curl/curl  Fixed in curl 7.87.0 –  —

TIMELINE
  Oct 20  Reserved by hackerone
  Feb 9   Published (CNA: hackerone)
  Oct 14  EXPLOIT PUBLISHED — CVE-2022-43552 (https://github.com/curl/curl). Public exploit reference added.

CWE-416 · CNA: hackerone · CVSS v3.1 · 7 references · NVD status: Modified

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
October 20, 2022	Reserved	Reserved by hackerone
February 9, 2023	Published	Published (CNA: hackerone)
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2022-43552 (https://github.com/curl/curl). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	https://github.com/curl/curl	—	Fixed in curl 7.87.0	—

Weaknesses

CWE-416

References (7)

http://seclists.org/fulldisclosure/2023/Mar/17 [Mailing List, Third Party Advisory]
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://cert-portal.siemens.com/productcert/html/ssa-892048.html
https://hackerone.com/reports/1764858 [Exploit, Issue Tracking, Third Party Advisory]
https://security.gentoo.org/glsa/202310-12 [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20230214-0002/ [Vendor Advisory]
https://support.apple.com/kb/HT213670 [Third Party Advisory]

Authoritative record: CVE-2022-43552 at cve.org

Weaknesses: CWE-416

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2022-43552 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.