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-2022-32221

CVE-2022-32221CRITICAL

n/a https://github.com/curl/curl — When doing HTTP(S) transfers, libcurl might erroneously use the read callback (`CURLOPT_READFUNCTION`) to ask for data to send, even when…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .0509   92.3     —

AFFECTED
  Product                       Versions           Fixed
  https://github.com/curl/curl  Fixed in 7.86.0 –  —

TIMELINE
  Jun 1   Reserved by hackerone
  Dec 5   Published (CNA: hackerone)
  Oct 14  EXPLOIT PUBLISHED — CVE-2022-32221 (https://github.com/curl/curl). Public exploit reference added.

CWE-668, CWE-200 · CNA: hackerone · CVSS v3.1 · 13 references · NVD status: Modified

Description

When doing HTTP(S) transfers, libcurl might erroneously use the read callback (`CURLOPT_READFUNCTION`) to ask for data to send, even when the `CURLOPT_POSTFIELDS` option has been set, if the same handle previously was used to issue a `PUT` request which used that callback. This flaw may surprise the application and cause it to misbehave and either send off the wrong data or use memory after free or similar in the subsequent `POST` request. The problem exists in the logic for a reused handle when it is changed from a PUT to a POST.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 1, 2022	Reserved	Reserved by hackerone
December 5, 2022	Published	Published (CNA: hackerone)
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2022-32221 (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 7.86.0	—

Weaknesses

CWE-668 · CWE-200

References (13)

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/2023/05/17/4 [Mailing List]
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://cert-portal.siemens.com/productcert/html/ssa-892048.html
https://hackerone.com/reports/1704017 [Exploit, Issue Tracking, Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2023/01/msg00028.html [Mailing List, Third Party Advisory]
https://security.gentoo.org/glsa/202212-01 [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20230110-0006/ [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20230208-0002/ [Third Party Advisory]
https://support.apple.com/kb/HT213604 [Third Party Advisory]
https://support.apple.com/kb/HT213605 [Third Party Advisory]
https://www.debian.org/security/2023/dsa-5330 [Third Party Advisory]

Authoritative record: CVE-2022-32221 at cve.org

Weaknesses: CWE-668 · CWE-200

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2022-32221 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.