CVE-2026-86413

Critical

When using an *ambient user* in a first transfer doing Negotiate authentication and asked to follow redirects, curl could pass on its…

curl·CWE-201·Published 2026-10-20

CVSS

9.1

EPSS

0.01

KEV

Exploits

cve.orgen

212 chars

When using an *ambient user* in a first transfer doing Negotiate authentication and asked to follow redirects, curl could pass on its credential details to an unrelated second origin when asked to redirect there.

NVDen

212 chars

CVSS metrics across sources

Version	Type	Source	Base	Exp	Impact	Vector
3.1	Primary	cve.org	9.1	—	—	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
3.1	Secondary	NVD	9.1	3.9	5.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
3.1	Secondary	ENISA EUVD	9.1	—	—	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N