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-2022-27779

CVE-2022-27779MEDIUM

n/a https://github.com/curl/curl — libcurl wrongly allows cookies to be set for Top Level Domains (TLDs) if thehost name is provided with a trailing dot.curl can be told to…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  L  N  N    5.3   .0278   86.2     —

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  ENRICHED — CVE-2022-27779 (https://github.com/curl/curl). Received CVSS 5.3 and CPE data from NVD.
  Oct 14  EXPLOIT PUBLISHED — CVE-2022-27779 (https://github.com/curl/curl). Public exploit reference added.

CWE-201 · CNA: hackerone · CVSS v3.1 · 4 references · NVD status: Modified

Description

libcurl wrongly allows cookies to be set for Top Level Domains (TLDs) if thehost name is provided with a trailing dot.curl can be told to receive and send cookies. curl's "cookie engine" can bebuilt with or without [Public Suffix List](https://publicsuffix.org/)awareness. If PSL support not provided, a more rudimentary check exists to atleast prevent cookies from being set on TLDs. This check was broken if thehost name in the URL uses a trailing dot.This can allow arbitrary sites to set cookies that then would get sent to adifferent and unrelated site or domain.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
March 23, 2022	Reserved	Reserved by hackerone
June 1, 2022	Published	Published (CNA: hackerone)
October 14, 2026	ENRICHED	ENRICHED — CVE-2022-27779 (https://github.com/curl/curl). Received CVSS 5.3 and CPE data from NVD.
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2022-27779 (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-201

References (4)

https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://hackerone.com/reports/1553301 [Exploit, Third Party Advisory]
https://security.gentoo.org/glsa/202212-01 [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20220609-0009/ [Third Party Advisory]

Authoritative record: CVE-2022-27779 at cve.org

Weaknesses: CWE-201

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2022-27779 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.