CVE-2020-27846

CRITICALNVD 9.89.8—

9.8

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 v3: 9.8
EG Score: 9.8(medium)
EPSS: 92.0%
KEV: Not listed

Published

December 21, 2020

Last Modified

November 21, 2024

Advisory Details (7)

Auto-updated May 26, 2026

Patch available. Sources: redhat, github.

generic

Security Advisories | Grafana Labs

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/

github Patch Available

XML Processing · Advisory · crewjam/saml · GitHub

https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9

redhat Patch Available

1907670 – (CVE-2020-27846) CVE-2020-27846 crewjam/saml: authentication bypass in saml authentication

Affected: Red Hat Enterprise Linux 8 packages a vulnerable version of crewjam/saml but does not use it, as SAML is only available for th

https://bugzilla.redhat.com/show_bug.cgi?id=1907670

generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20210205-0002/

generic

Coordinated disclosure of XML round-trip vulnerabilities in Go library

https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/

generic

[SECURITY] Fedora 33 Update: grafana-7.3.6-1.fc33 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ICP3YRY2VUCNCF2VFUSK77ZMRIC77FEM/

generic

[SECURITY] Fedora 32 Update: grafana-7.3.6-1.fc32 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YUTKIRWT6TWU7DS6GF3EOANVQBFQZYI/

Patch Availability(2)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
redhat	grafana-0:7.3.6-2.el8	2021-05-18	redhat
redhat	openshift4/ose-grafana:v4.7.0-202102130115.p0	2021-02-24	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)

Go(1)

Package	Vulnerable range	Fixed in	Dependents
github.com/crewjam/saml	—	0.4.3	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-115

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 23:09 UTCEG score recompute
2026-05-26 23:09 UTCVendor advisory
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-23 09:31 UTCOSV refresh

Frequently asked(5)

What is CVE-2020-27846?

CVE-2020-27846 is a critical vulnerability published on December 21, 2020. 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.

When was CVE-2020-27846 disclosed?

CVE-2020-27846 was first published in the National Vulnerability Database on December 21, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-27846 actively exploited?

CVE-2020-27846 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 92.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-27846?

CVE-2020-27846 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2020-27846?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-27846, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-27846

Explore →

Is Your Infrastructure Affected by CVE-2020-27846?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2020-27846

📅 Published

🔄 Last Modified

📋 Advisory Details (7)

Security Advisories | Grafana Labs

XML Processing · Advisory · crewjam/saml · GitHub

1907670 – (CVE-2020-27846) CVE-2020-27846 crewjam/saml: authentication bypass in saml authentication

NetApp Product Security

Coordinated disclosure of XML round-trip vulnerabilities in Go library

[SECURITY] Fedora 33 Update: grafana-7.3.6-1.fc33 - package-announce - Fedora mailing-lists

[SECURITY] Fedora 32 Update: grafana-7.3.6-1.fc32 - package-announce - Fedora mailing-lists

Patch Availability(2)

Affected Packages

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-27846?

Published

Last Modified

Advisory Details (7)

Frequently asked(5)