Alg-None — PoC Archivehttps://poc.intelseclab.com/tags/alg-none/Latest proof-of-concept entries.Hugoen-usSun, 19 Jul 2026 00:00:00 +0000SimpleHelp OIDC Authentication Bypass via Unverified JWT Signature (CVE-2026-48558)https://poc.intelseclab.com/pocs/web/2026-07-19_cve-2026-48558-simplehelp-oidc-auth-bypass/Sun, 19 Jul 2026 00:00:00 +0000https://poc.intelseclab.com/pocs/web/2026-07-19_cve-2026-48558-simplehelp-oidc-auth-bypass/Critical severity (CVSS 10) — web · CVE-2026-48558. Status: Weaponized — forges valid privileged sessions with no credentials. Affects: SimpleHelp — remote support / RMM (remote monitoring and management) platform, OIDC authentication flow. Tags: simplehelp, rmm, oidc, jwt, alg-none, cwe-347, authentication-bypass, unauthenticated, remote, kev, actively-exploited, ransomware.webCriticalsimplehelprmmoidcjwtalg-nonecwe-347authentication-bypassunauthenticatedremotekevactively-exploitedransomwareSimpleHelp OIDC Authentication Bypass (CVE-2026-48558)https://poc.intelseclab.com/pocs/web/2026-07-05_cve-2026-48558-simplehelp-oidc-auth-bypass/Sun, 05 Jul 2026 00:00:00 +0000https://poc.intelseclab.com/pocs/web/2026-07-05_cve-2026-48558-simplehelp-oidc-auth-bypass/Critical severity (CVSS 9.8) — web · CVE-2026-48558. Status: PoC. Affects: SimpleHelp remote support / remote monitoring & management (RMM) server, OIDC authentication flow. Tags: simplehelp, oidc, jwt, alg-none, auth-bypass, rmm, remote-support, cisa-kev.webCriticalsimplehelpoidcjwtalg-noneauth-bypassrmmremote-supportcisa-kevpac4j JWT Authentication Bypass via Unsigned Token in JWE Wrapper — CVE-2026-29000https://poc.intelseclab.com/pocs/web/2026-07-05_cve-2026-29000-pac4j-jwt-auth-bypass/Sun, 05 Jul 2026 00:00:00 +0000https://poc.intelseclab.com/pocs/web/2026-07-05_cve-2026-29000-pac4j-jwt-auth-bypass/Critical severity (CVSS 9.8) — web · CVE-2026-29000. Status: Weaponized. Affects: pac4j (JWT authentication module), used in Java web applications. Tags: pac4j, jwt, jwe, auth-bypass, alg-none, jwks, privilege-escalation, java.webCriticalpac4jjwtjweauth-bypassalg-nonejwksprivilege-escalationjavaNextcloud user_oidc ID4me JWT Signature Bypass (CVE-2026-45156)https://poc.intelseclab.com/pocs/web/2026-07-05_cve-2026-45156-nextcloud-id4me-jwt-bypass/Sun, 05 Jul 2026 00:00:00 +0000https://poc.intelseclab.com/pocs/web/2026-07-05_cve-2026-45156-nextcloud-id4me-jwt-bypass/High severity (CVSS 8.1) — web · CVE-2026-45156. Status: PoC. Affects: Nextcloud user_oidc app — ID4me identity provider integration. Tags: nextcloud, user_oidc, id4me, jwt, alg-none, authentication-bypass, cwe-347.webHighnextclouduser_oidcid4mejwtalg-noneauthentication-bypasscwe-347