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NVD / CVE Program· CNA redhat

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

CriticalCVSS 9.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Plan (action score 40/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 4.9% (FIRST EPSS); higher than 92.2% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: github.com/crewjam/saml (Go) 0.4.3; grafana (Red Hat:enterprise_linux:8::appstream) 0:7.3.6-2.el8; grafana-debuginfo (Red Hat:enterprise_linux:8::appstream) 0:7.3.6-2.el8.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Add it to your regular patch cycle. Upgrade to github.com/crewjam/saml (Go) 0.4.3; grafana (Red Hat:enterprise_linux:8::appstream) 0:7.3.6-2.el8; grafana-debuginfo (Red Hat:enterprise_linux:8::appstream) 0:7.3.6-2.el8 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Dec 21, 2020
Updated
Jun 16, 2026
EPSS
4.9% · 92th percentile

Report tools

JSON

Action score

40

Plan

Add it to your regular patch cycle.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 4.9%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
grafanagrafana
saml projectsaml
redhatopenshift container platform
redhatopenshift service mesh
redhatenterprise linux
fedoraprojectfedora

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a crewjam/saml

    • grafana-7.3.6, grafana-7.2.3, grafana-6.7.5, github.com/crewjam/saml-0.4.3affected
Affected versions · NVD (10)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • fedoraproject fedora32
  • fedoraproject fedora33
  • grafana grafana7.3.0 and later · before 7.3.6
  • grafana grafanabefore 6.7.5
  • grafana grafana7.0.0 and later · before 7.2.3
  • redhat enterprise linux8.0
  • redhat openshift container platform3.11
  • redhat openshift container platform4.0
  • redhat openshift service mesh2.0
  • saml project samlbefore 0.4.3

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Gogithub.com/crewjam/samlbefore 0.4.30.4.3
Red Hat:enterprise_linux:8::appstreamgrafanabefore 0:7.3.6-2.el80:7.3.6-2.el8
Red Hat:enterprise_linux:8::appstreamgrafana-debuginfobefore 0:7.3.6-2.el80:7.3.6-2.el8
Rocky Linux:8grafanabefore 0:7.3.6-2.el80:7.3.6-2.el8

Same product

grafana: all records

Other highest-scoring records for the same primary product.

Published before and after this one in the same product

  • ← EarlierCVE-2019-19499Aug 28, 2020 · Grafana <= 6.4.3 has an Arbitrary File Read vulnerability, which could be exploited by an authenticated attacker that has privileges to…
    27Monitor
  • ← EarlierCVE-2020-24303Oct 28, 2020 · Grafana before 7.1.0-beta 1 allows XSS via a query alias for the ElasticSearch datasource.
    25Monitor
  • Later →CVE-2021-27358Mar 18, 2021 · The snapshot feature in Grafana 6.7.3 through 7.4.1 can allow an unauthenticated remote attackers to trigger a Denial of Service via a…
    55Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Go:github.com/crewjam/saml0.4.3Package registry (OSV)
red hat:grafana0:7.3.6-2.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:grafana-debuginfo0:7.3.6-2.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
rocky linux:grafana0:7.3.6-2.el8 · Rocky Linux:8Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-115 · Misinterpretation of Input

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records