Insertion of Sensitive Information Into Sent Data Affecting libcurl package, versions [8.21.0,8.23.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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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)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.