VULNERABILITY INTELLIGENCE

CVE-2023-27536

CVSS score5.9 MEDIUM
EPSS probability1.76%
CISA KEVNot currently listed
Published2023-03-30
Last modified2026-10-23
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Description

An authentication bypass vulnerability exists libcurl <8.0.0 in the connection reuse feature which can reuse previously established connections with incorrect user permissions due to a failure to check for changes in the CURLOPT_GSSAPI_DELEGATION option. This vulnerability affects krb5/kerberos/negotiate/GSSAPI transfers and could potentially result in unauthorized access to sensitive information. The safest option is to not reuse connections if the CURLOPT_GSSAPI_DELEGATION option has been changed.

Weakness classification

  • support@hackerone.com: CWE-305
  • nvd@nist.gov: CWE-287

Primary references