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Vulnerability record · CVE-2020-27846 · published 21 December 2020

CVE-2020-27846: Grafana vulnerability

Grafana · Grafana

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.

9.8 CVSS 3.1 Critical EPSS 4.9% · top 8.2% CWE-115 · CWE-115
9.8CVSS 3.1 base score, v2 10.0
4.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
14References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=1907670 Issue TrackingPatchThird Party Advisory
https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9 Third 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-enter Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YUTKIRWT6TWU7DS6GF3EOA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ICP3YRY2VUCNCF2VFUSK77Z
https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/ ExploitThird Party Advisory
https://security.netapp.com/advisory/ntap-20210205-0002/ Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1907670 Issue TrackingPatchThird Party Advisory
https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9 Third 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-enter Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YUTKIRWT6TWU7DS6GF3EOA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ICP3YRY2VUCNCF2VFUSK77Z
https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/ ExploitThird Party Advisory
https://security.netapp.com/advisory/ntap-20210205-0002/ Third Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-27846), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.