{"id":10502,"date":"2026-09-04T18:51:04","date_gmt":"2026-09-04T10:51:04","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-72889"},"modified":"2026-09-04T18:51:04","modified_gmt":"2026-09-04T10:51:04","slug":"cve-2026-72889","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-72889","title":{"rendered":"CVE-2026-72889 [CRITICAL] &#8211; Net::OAuth versions before 0.33 for Perl allow the sender to choose the signature algorith"},"content":{"rendered":"<p>Net::OAuth versions before 0.33 for Perl allow the sender to choose the signature algorithm in verify.<\/p>\n<p>verify resolves the signature method class from the signature_method parameter of the incoming message. signature_method is required on every request, so the algorithm used to check a signature is chosen by whoever sent it, and nothing lets the verifying party pin the method instead. When a message names HMAC-SHA1 or HMAC-SHA256, the key is derived from consumer_secret and token_secret rather than from the key the provider deployed.<\/p>\n<p>A provider deployed on RSA-SHA1 holds only the consumer public key, and RFC 5849 does not use consumer_secret for that method, so the required parameter is filled with a placeholder. A client that names HMAC-SHA1 instead has its signature checked against that placeholder, so a guessable one is enough to forge requests for any consumer key and token.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Net::OAuth versions before 0.33 for Perl allow the sender to choose the signature algorithm in verify.<\/p>\n<p>verify resolves the signature method class from the signature_method parameter of the incoming m<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-10502","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/10502","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10502"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10502"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}