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[CVE-2026-18217] SAML Redirect Binding Parameter Pollution #51781
Description
CVE-2026-18217: A flaw was found in the SAML protoco 8000 l implementation of Keycloak, an open-source identity and access management solution. The issue occurs when Keycloak handles SAML authentication requests using the HTTP-Redirect binding. If a client is configured with a wildcard redirect URL, an attacker can craft a request that includes malicious parameters. When a user authenticates, Keycloak appends its legitimate response to the attacker's parameters. This can cause some service providers to process the attacker's data instead of the real login information, potentially leading to a user being logged into the wrong account.
This issue was originally tracked in the private repository. Migrated by @ahus1.
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[CVE-2026-18217] SAML Redirect Binding Parameter Pollution
[CVE-2026-18217] SAML Redirect Binding Parameter Pollution
[CVE-2026-18217] SAML Redirect Binding Parameter Pollution
[CVE-2026-18217] SAML Redirect Binding Parameter Pollution
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[CVE-2026-18217] SAML Redirect Binding Parameter Pollution (#51861)
[CVE-2026-18217] SAML Redirect Binding Parameter Pollution (#51861)