CVE-2026-44431
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk38th percentile - higher than 38% of all known CVEs
Summary
A vulnerability in the urllib3 library for Python (versions 1.23 to 2.7.0) allows leakage of sensitive HTTP headers during cross-origin redirects. The issue occurs when using the low-level API ProxyManager.connection_from_url().urlopen() with assert_same_host=False.
Risk Assessment
An attacker can intercept sensitive authentication data (e.g., tokens, cookies) sent in headers during redirects to external servers, leading to confidentiality breaches and potential session hijacking.
Recommendation
Immediately update urllib3 to version 2.7.0 or later. In the meantime, avoid using assert_same_host=False in connections with ProxyManager.
Related vulnerabilities
- CVE-2026-108707Critical
Wukong_HRM through commit 186115e contains an authentication bypass vulnerability in ParamAspect that allows unauthenticated attackers to call every HRM API endpoint by omitting the AUTH-TOKEN header. Attackers gain HR administrator access to read payslips, salary history and employee personal data, download attachments, and modify or delete company-wide HR records.
- CVE-2026-81797Critical
The WordPress theme Buzz Stone | Magazine & Viral Blog in versions up to 1.0.2 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-78535Critical
The WordPress theme Photolia in versions up to 1.0.3 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-78533Critical
The WordPress theme Qwery in versions up to 3.6.1 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-78531Critical
The WordPress theme Jacqueline in versions up to 2.22 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-78529Critical
The WordPress theme Alliance in versions up to 3.11 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-66569Critical
The WordPress theme Kicker in versions up to 2.2.1 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-66568Critical
The WordPress theme Original in versions up to 1.9.0 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-66567Critical
The WordPress theme Anesta in versions up to 1.5.3 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
- CVE-2026-66565Critical
The WordPress theme FC United in versions up to 1.1.1 contains a PHP Object Injection vulnerability. An unauthenticated attacker can inject a malicious PHP object, potentially leading to arbitrary code execution or other severe impacts.
Original NVD description (English source)
urllib3 is an HTTP client library for Python. From 1.23 to before 2.7.0, cross-origin redirects followed from the low-level API via ProxyManager.connection_from_url().urlopen(..., assert_same_host=False) still forward these sensitive headers. This vulnerability is fixed in 2.7.0.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

