{"id":82729,"date":"2026-07-30T11:46:28","date_gmt":"2026-07-30T08:16:28","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-18353-unauthenticated-ssrf-in-pia-via-oidc-issuer-allowlist-bypass\/"},"modified":"2026-07-30T11:46:28","modified_gmt":"2026-07-30T08:16:28","slug":"cve-2026-18353-unauthenticated-ssrf-in-pia-via-oidc-issuer-allowlist-bypass","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-18353-unauthenticated-ssrf-in-pia-via-oidc-issuer-allowlist-bypass\/","title":{"rendered":"CVE-2026-18353 &#8211; Unauthenticated SSRF in PIA via OIDC issuer allowlist bypass"},"content":{"rendered":"<p>CVE ID :CVE-2026-18353<\/p>\n<p>  Published : July 30, 2026, 8:16 a.m. | 1\u00a0hour, 28\u00a0minutes ago<\/p>\n<p>  Description :PIA&#8217;s `POST \/v1\/upload\/sbom` endpoint accepts a Bearer JWT and checks its **unverified** `iss` claim against an issuer allowlist using Python&#8217;s `urlparse` before performing OIDC discovery with `requests`. Because `urlparse` and `requests`\/`urllib3` parse an authority string containing a backslash (e.g. `https:\/\/attacker-host@ci.eclipse.org\/`) into *different* hostnames, an attacker can craft an issuer that passes the allowlist check yet drives `requests` \u2014 and subsequently `urllib.request.urlopen` for JWKS retrieval \u2014 to connect to an arbitrary attacker-chosen host, port, and scheme.<\/p>\n<p>  Severity: 8.8 | 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-2026-18353 Published : July 30, 2026, 8:16 a.m. | 1\u00a0hour, 28\u00a0minutes ago Description :PIA&#8217;s `POST \/v1\/upload\/sbom` endpoint accepts a Bearer JWT and checks its **unverified** `iss` claim against an issuer allowlist using Python&#8217;s `urlparse` before performing OIDC discovery with `requests`. Because `urlparse` and `requests`\/`urllib3` parse an authority string containing a backslash (e.g. `https:\/\/attacker-host@ci.eclipse.org\/`) &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-82729","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82729","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=82729"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82729\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=82729"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=82729"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=82729"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}