Insertion of Sensitive Information Into Sent Data Affecting libcurl package, versions [8.21.0,8.23.0)
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Test your applications- Snyk IDSNYK-CONAN-LIBCURL-21194886
- published18 Oct 2026
- disclosed14 Oct 2026
- creditUnknown
Introduced: 14 Oct 2026
NewCVE-2026-86413 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade libcurl to version 8.23.0 or higher.
Overview
Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the Negotiate authentication process when configured to follow HTTP redirects using system-provided Kerberos credentials. An attacker can obtain sensitive authentication data by redirecting a client to a secondary URL containing embedded credentials. This is only exploitable if the client is configured to use Negotiate authentication with ambient Kerberos credentials and is set to follow redirects to a destination with embedded credentials.