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-2022-27781

CVE-2022-27781HIGH

n/a https://github.com/curl/curl — libcurl provides the `CURLOPT_CERTINFO` option to allow applications torequest details to be returned about a server's certificate chain.…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  H    7.5   .0290   86.7     —

AFFECTED
  Product                       Versions           Fixed
  https://github.com/curl/curl  Fixed in 7.83.1 –  —

TIMELINE
  Mar 23  Reserved by hackerone
  Jun 1   Published (CNA: hackerone)
  Oct 14  EXPLOIT PUBLISHED — CVE-2022-27781 (https://github.com/curl/curl). Public exploit reference added.

CWE-835, CWE-400 · CNA: hackerone · CVSS v3.1 · 7 references · NVD status: Modified

Description

libcurl provides the `CURLOPT_CERTINFO` option to allow applications torequest details to be returned about a server's certificate chain.Due to an erroneous function, a malicious server could make libcurl built withNSS get stuck in a never-ending busy-loop when trying to retrieve thatinformation.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
March 23, 2022	Reserved	Reserved by hackerone
June 1, 2022	Published	Published (CNA: hackerone)
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2022-27781 (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 7.83.1	—

Weaknesses

CWE-835 · CWE-400

References (7)

https://cert-portal.siemens.com/productcert/html/ssa-146325.html
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://hackerone.com/reports/1555441 [Exploit, Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html [Mailing List, Third Party Advisory]
https://security.gentoo.org/glsa/202212-01 [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20220609-0009/ [Third Party Advisory]
https://www.debian.org/security/2022/dsa-5197 [Mailing List, Third Party Advisory]

Authoritative record: CVE-2022-27781 at cve.org

Weaknesses: CWE-835 · CWE-400

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2022-27781 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.