{"id":82878,"date":"2026-08-02T16:46:54","date_gmt":"2026-08-02T13:16:54","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-68581-vikunja-0-22-0-through-2-3-0-authentication-bypass-via-principal-id-collision\/"},"modified":"2026-08-02T16:46:54","modified_gmt":"2026-08-02T13:16:54","slug":"cve-2026-68581-vikunja-0-22-0-through-2-3-0-authentication-bypass-via-principal-id-collision","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-68581-vikunja-0-22-0-through-2-3-0-authentication-bypass-via-principal-id-collision\/","title":{"rendered":"CVE-2026-68581 &#8211; Vikunja 0.22.0 through 2.3.0 Authentication Bypass via Principal ID Collision"},"content":{"rendered":"<p>CVE ID :CVE-2026-68581<\/p>\n<p>  Published : Aug. 2, 2026, 1:16 p.m. | 35\u00a0minutes ago<\/p>\n<p>  Description :Vikunja versions 0.22.0 through 2.3.0 fail to validate the principal type in API token management. Because user IDs and link-share IDs are independent numeric sequences and both resolve through a generic web.Auth.GetID() interface, a link-share JWT whose numeric ID equals a target user&#8217;s ID is treated as that user by the \/api\/v1\/tokens endpoints. An authenticated attacker can obtain a target&#8217;s numeric user ID via authenticated user search, then create link shares on an attacker-writable project until the link-share sequence reaches that value, and use the resulting link-share JWT to list, create, and delete the target user&#8217;s API tokens (including issuing a new token with attacker-chosen scopes under the target&#8217;s permissions). Fixed in version 2.4.0.<\/p>\n<p>  Severity: 8.6 | 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-2026-68581 Published : Aug. 2, 2026, 1:16 p.m. | 35\u00a0minutes ago Description :Vikunja versions 0.22.0 through 2.3.0 fail to validate the principal type in API token management. Because user IDs and link-share IDs are independent numeric sequences and both resolve through a generic web.Auth.GetID() interface, a link-share JWT whose numeric ID equals a &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-82878","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82878","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=82878"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82878\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=82878"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=82878"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=82878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}