{"id":81993,"date":"2026-07-14T20:47:14","date_gmt":"2026-07-14T17:17:14","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-59884-pyasn1-ber-cer-der-decoder-denial-of-service-via-unbounded-long-form-tag-ids\/"},"modified":"2026-07-14T20:47:14","modified_gmt":"2026-07-14T17:17:14","slug":"cve-2026-59884-pyasn1-ber-cer-der-decoder-denial-of-service-via-unbounded-long-form-tag-ids","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-59884-pyasn1-ber-cer-der-decoder-denial-of-service-via-unbounded-long-form-tag-ids\/","title":{"rendered":"CVE-2026-59884 &#8211; pyasn1 BER\/CER\/DER decoder denial of service via unbounded long-form tag IDs"},"content":{"rendered":"<p>CVE ID :CVE-2026-59884<\/p>\n<p>  Published : July 14, 2026, 5:17 p.m. | 13\u00a0minutes ago<\/p>\n<p>  Description :pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the BER decoder shared by the CER and DER codecs parses long-form tags by accumulating continuation octets without an upper bound on the tag ID size, allowing a crafted input to force construction of an arbitrarily large integer with CPU cost growing quadratically and to trigger unhandled ValueError exceptions in Python 3.11+ error formatting paths. Any application decoding untrusted BER, CER, or DER input is affected. This issue is fixed in version 0.6.4.<\/p>\n<p>  Severity: 7.5 | HIGH<\/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-2026-59884 Published : July 14, 2026, 5:17 p.m. | 13\u00a0minutes ago Description :pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the BER decoder shared by the CER and DER codecs parses long-form tags by accumulating continuation octets without an upper bound on the tag ID size, allowing a crafted input &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-81993","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/81993","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=81993"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/81993\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=81993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=81993"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=81993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}