CVE-2020-27846

Name: CVE-2020-27846
Creator: NVD / NIST
Published: 2020-12-21T16:15:13.067+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.81%

Last modified Jun 17, 2026

CVE-2020-27846 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A signature verification vulnerability exists in crewjam/saml. This flaw allows an attacker to bypass SAML Authentication. EPSS estimates a 4.81% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

4.81%

90.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-115

Affected Software

Vendor	Product	Versions
Grafana	Grafana	< 6.7.5
Grafana	Grafana	>= 7.0.0, < 7.2.3
Grafana	Grafana	>= 7.3.0, < 7.3.6
Saml Project	Saml	< 0.4.3
Redhat	Openshift Container Platform	3.11
Redhat	Openshift Container Platform	4.0
Redhat	Openshift Service Mesh	2.0
Redhat	Enterprise Linux	8.0
Fedoraproject	Fedora	32
Fedoraproject	Fedora	33

References

https://bugzilla.redhat.com/show_bug.cgi?id=1907670Issue Tracking, Patch, Third Party Advisory
https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9Third Party Advisory
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/Vendor Advisory
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://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/Exploit, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210205-0002/Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1907670Issue Tracking, Patch, Third Party Advisory
https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9Third Party Advisory
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/Vendor Advisory
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://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/Exploit, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210205-0002/Third Party Advisory

Timeline

Published: Dec 21, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27846?

How severe is CVE-2020-27846?

CVE-2020-27846 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.81% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27846?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-27846?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST