Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-6429

CVE-2026-6429MEDIUM

curl curl — netrc credential leak with reused proxy connection

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   L   N  U  H  N  N    5.3   .0051   41.6     —

AFFECTED
  Product  Versions                                    Fixed
  curl     7.14.0 –                                    —
  curl     01165e08e0d131b399fba2190f17af67e66f0888 –  —
  curl     8.19.0 –                                    —

TIMELINE
  Apr 16  Reserved by curl
  May 13  Published (CNA: curl)
  Sep 15  EXPLOIT PUBLISHED — CVE-2026-6429 (curl). Public exploit reference added.

CWE-200 · CNA: curl · CVSS v3.1 · 3 references · NVD status: Modified

Description

When asked to both use a `.netrc` file for credentials and to follow HTTP redirects, libcurl could leak the password used for the first host to the followed-to host under certain circumstances.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
April 16, 2026	Reserved	Reserved by curl
May 13, 2026	Published	Published (CNA: curl)
September 15, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-6429 (curl). Public exploit reference added.

Affected

Affected products and packages — 3 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
curl	curl	—	7.14.0	—
curl	curl	—	01165e08e0d131b399fba2190f17af67e66f0888	—
curl	curl	—	8.19.0	—

Weaknesses

CWE-200

References (3)

https://curl.se/docs/CVE-2026-6429.html [Patch, Vendor Advisory]
https://curl.se/docs/CVE-2026-6429.json [Product]
https://hackerone.com/reports/3677759 [Exploit, Issue Tracking, Third Party Advisory]

Authoritative record: CVE-2026-6429 at cve.org

Vendors: curl

Weaknesses: CWE-200

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-6429 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 Sunday, October 4, 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.