CVE-2023-27536

MediumCVSS 5.9/10Last modified Oct 23, 2026

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.

Metrics

CVSS 3.1 5.9/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-305 CWE-287

Affected software

No affected versions have been published.

Timeline

Published: Mar 30, 2023
Last modified: Oct 23, 2026
NVD status: Modified

Related CVEs from 2023

CVE-2023-275375.9A double free vulnerability exists in libcurl <8.0.0 when sharing HSTS data between separate "handles". This sharing was introduced without CVE-2023-275385.5An authentication bypass vulnerability exists in libcurl prior to v8.0.0 where it reuses a previously established SSH connection despite the CVE-2023-275395.3There is a denial of service vulnerability in the header parsing component of Rack.CVE-2023-27546.8The Cloudflare WARP client for Windows assigns loopback IPv4 addresses for the DNS Servers, since WARP acts as local DNS server that perform CVE-2023-275407.5IBM Watson CP4D Data Stores 4.6.0 does not properly allocate resources without limits or throttling which could allow a remote attacker with CVE-2023-275455.5IBM Watson CloudPak for Data Data Stores information disclosure 4.6.0 allows web pages to be stored locally which can be read by another use CVE-2023-275546.3IBM WebSphere Application Server 8.5 and 9.0 is vulnerable to an XML External Entity Injection (XXE) attack when processing XML data. A remo CVE-2023-275557.5IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11.5 is vulnerable to a denial of service when attempting to use ACR clien CVE-2023-275567.5IBM Counter Fraud Management for Safer Payments 6.1.0.00, 6.2.0.00, 6.3.0.00 through 6.3.1.03, 6.4.0.00 through 6.4.2.02 and 6.5.0.00 does n CVE-2023-275577.5IBM Counter Fraud Management for Safer Payments 6.1.0.00 through 6.1.1.02, 6.2.0.00 through 6.2.2.02, 6.3.0.00 through 6.3.1.02, 6.4.0.00 th CVE-2023-275587.8IBM Db2 on Windows 10.5, 11.1, and 11.5 may be vulnerable to a privilege escalation caused by at least one installed service using an unquot CVE-2023-275597.5IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 10.5, 11.1, and 11.5 is vulnerable to a denial of service as the server ma