{"id":78493,"date":"2026-05-15T01:46:44","date_gmt":"2026-05-14T22:16:44","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-44428-mcp-registry-github-oidc-tokens-replayable-across-registry-deployments-due-to-shared-audience\/"},"modified":"2026-05-15T01:46:44","modified_gmt":"2026-05-14T22:16:44","slug":"cve-2026-44428-mcp-registry-github-oidc-tokens-replayable-across-registry-deployments-due-to-shared-audience","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-44428-mcp-registry-github-oidc-tokens-replayable-across-registry-deployments-due-to-shared-audience\/","title":{"rendered":"CVE-2026-44428 &#8211; MCP Registry: GitHub OIDC tokens replayable across registry deployments due to shared audience"},"content":{"rendered":"<p>CVE ID :CVE-2026-44428<\/p>\n<p>  Published : May 14, 2026, 10:16 p.m. | 41\u00a0minutes ago<\/p>\n<p>  Description :The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. Prior to 1.7.6, the client-side and server-side GitHub OIDC flow is bound only to a global audience string, not to the specific registry instance being targeted. On the client side, the publisher always appends audience=mcp-registry when requesting the GitHub Actions ID token, regardless of the selected &#8211;registry URL. On the server side, the exchange endpoint validates only that same fixed audience and then derives publish permissions directly from repository_owner. As a result, a token legitimately obtained while interacting with one registry deployment remains acceptable to any other deployment that shares the same code and audience string. This vulnerability is fixed in 1.7.6.<\/p>\n<p>  Severity: 2.1 | LOW<\/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-2026-44428 Published : May 14, 2026, 10:16 p.m. | 41\u00a0minutes ago Description :The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. Prior to 1.7.6, the client-side and server-side GitHub OIDC flow is bound only to a global audience string, not to the specific &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-78493","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/78493","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=78493"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/78493\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=78493"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=78493"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=78493"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}