{"id":75740,"date":"2026-01-08T03:02:11","date_gmt":"2026-01-07T23:32:11","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2025-15346-wolfssl-python-library-cert_required-mode-fails-to-enforce-client-certificate-requirement\/"},"modified":"2026-01-08T03:02:11","modified_gmt":"2026-01-07T23:32:11","slug":"cve-2025-15346-wolfssl-python-library-cert_required-mode-fails-to-enforce-client-certificate-requirement","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2025-15346-wolfssl-python-library-cert_required-mode-fails-to-enforce-client-certificate-requirement\/","title":{"rendered":"CVE-2025-15346 &#8211; wolfSSL Python library `CERT_REQUIRED` mode fails to enforce client certificate requirement"},"content":{"rendered":"<p>CVE ID : CVE-2025-15346<\/p>\n<p>Published :  Jan. 7, 2026, 11:32 p.m. | 55\u00a0minutes ago<\/p>\n<p>Description : A vulnerability in the handling of verify_mode = CERT_REQUIRED in the wolfssl Python package (wolfssl-py) causes client certificate requirements to not be fully enforced.\u00a0<\/p>\n<p>Because the WOLFSSL_VERIFY_FAIL_IF_NO_PEER_CERT flag was not included, the behavior effectively matched CERT_OPTIONAL: a peer certificate was verified if presented, but connections were incorrectly authenticated when no client certificate was provided.\u00a0<\/p>\n<p>This results in improper authentication, allowing attackers to bypass mutual TLS (mTLS) client authentication by omitting a client certificate during the TLS handshake.\u00a0<\/p>\n<p>The issue affects versions up to and including 5.8.2.<\/p>\n<p>Severity: 9.3 | CRITICAL<\/p>\n<p>Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID : CVE-2025-15346 Published : Jan. 7, 2026, 11:32 p.m. | 55\u00a0minutes ago Description : A vulnerability in the handling of verify_mode = CERT_REQUIRED in the wolfssl Python package (wolfssl-py) causes client certificate requirements to not be fully enforced.\u00a0 Because the WOLFSSL_VERIFY_FAIL_IF_NO_PEER_CERT flag was not included, the behavior effectively matched CERT_OPTIONAL: a peer certificate &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-75740","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/75740","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=75740"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/75740\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=75740"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=75740"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=75740"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}