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-2022-27780

CVE-2022-27780HIGH

n/a https://github.com/curl/curl — The curl URL parser wrongly accepts percent-encoded URL separators like '/'when decoding the host name part of a URL, making it a *differ…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  H  N    7.5   .0252   84.6     —

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-2022-27780 (https://github.com/curl/curl). Public exploit reference added.
  Oct 14  RESCORED — CVE-2022-27780 (https://github.com/curl/curl). CVSS 5.3 → 7.5 (NVD).

CWE-918, CWE-177 · CNA: hackerone · CVSS v3.1 · 4 references · NVD status: Modified

Description

The curl URL parser wrongly accepts percent-encoded URL separators like '/'when decoding the host name part of a URL, making it a *different* URL usingthe wrong host name when it is later retrieved.For example, a URL like `http://example.com%2F127.0.0.1/`, would be allowed bythe parser and get transposed into `http://example.com/127.0.0.1/`. This flawcan be used to circumvent filters, checks and more.

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	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2022-27780 (https://github.com/curl/curl). Public exploit reference added.
October 14, 2026	RESCORED	RESCORED — CVE-2022-27780 (https://github.com/curl/curl). CVSS 5.3 → 7.5 (NVD).

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-918 · CWE-177

References (4)

https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://hackerone.com/reports/1553841 [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-2022-27780 at cve.org

Weaknesses: CWE-918 · CWE-177

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2022-27780 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.