Description
A flaw was found in curl. When curl is configured to follow HTTP redirects while performing Negotiate authentication using system-provided Kerberos credentials, it may forward authentication details to an unrelated destination. A malicious server can exploit this flaw by redirecting the client to a target URL containing embedded user credentials, resulting in information disclosure of sensitive authentication data.
Published: n/a
Score: 5.3 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
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Remediation

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Advisories

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History

Sat, 17 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
Description A flaw was found in curl. When curl is configured to follow HTTP redirects while performing Negotiate authentication using system-provided Kerberos credentials, it may forward authentication details to an unrelated destination. A malicious server can exploit this flaw by redirecting the client to a target URL containing embedded user credentials, resulting in information disclosure of sensitive authentication data.
Title curl: curl: Negotiate credentials sent to redirected origin
Weaknesses CWE-201
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N'}

threat_severity

Low

Subscriptions

No data.

cve-icon MITRE

No data.

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

Severity : Low

Publid Date: 2026-10-14T12:00:00Z

Links: CVE-2026-86413 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-17T02:00:07Z

Weaknesses