{"id":78489,"date":"2026-05-14T23:47:39","date_gmt":"2026-05-14T20:17:39","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-42327-rust-openssl-undefined-behavior-in-x509refocsp_responders-for-certificates-with-non-utf-8-ocsp-urls\/"},"modified":"2026-05-14T23:47:39","modified_gmt":"2026-05-14T20:17:39","slug":"cve-2026-42327-rust-openssl-undefined-behavior-in-x509refocsp_responders-for-certificates-with-non-utf-8-ocsp-urls","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-42327-rust-openssl-undefined-behavior-in-x509refocsp_responders-for-certificates-with-non-utf-8-ocsp-urls\/","title":{"rendered":"CVE-2026-42327 &#8211; rust-openssl: undefined behavior in X509Ref::ocsp_responders for certificates with non-UTF-8 OCSP URLs"},"content":{"rendered":"<p>CVE ID :CVE-2026-42327<\/p>\n<p>  Published : May 14, 2026, 8:17 p.m. | 40\u00a0minutes ago<\/p>\n<p>  Description :rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.9.7 to before 0.10.79, X509Ref::ocsp_responders returns OCSP responder URLs from a certificate&#8217;s AIA extension as OpensslString, whose Deref wraps the raw bytes with str::from_utf8_unchecked. OpenSSL does not enforce that the underlying IA5String is ASCII, so a certificate with non-UTF-8 bytes in its OCSP accessLocation causes safe Rust code to construct a &amp;str that violates the UTF-8 invariant \u2014 resulting in undefined behavior. This vulnerability is fixed in 0.10.79.<\/p>\n<p>  Severity: 0.0 | NA<\/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-2026-42327 Published : May 14, 2026, 8:17 p.m. | 40\u00a0minutes ago Description :rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.9.7 to before 0.10.79, X509Ref::ocsp_responders returns OCSP responder URLs from a certificate&#8217;s AIA extension as OpensslString, whose Deref wraps the raw bytes with str::from_utf8_unchecked. OpenSSL does not enforce that the underlying &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-78489","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/78489","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=78489"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/78489\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=78489"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=78489"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=78489"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}