Is CVE-2020-26276 in the CISA KEV catalog?

No. CVE-2020-26276 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-26276?

CVE-2020-26276 has a CVSS v3 base score of 10.0 (CRITICAL).

What is the EPSS score for CVE-2020-26276?

CVE-2020-26276 has an EPSS score of 2.17% (80th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-26276?

Upgrade fleet to 3.5.1 or later.

CVE & CISA-KEV Catalog

CVE-2020-26276

CRITICALEPSS 80th pctl

10.0

CVSS v3

NVD

Description

Fleet is an open source osquery manager. In Fleet before version 3.5.1, due to issues in Go's standard library XML parsing, a valid SAML response may be mutated by an attacker to modify the trusted document. This can result in allowing unverified logins from a SAML IdP. Users that configure Fleet with SSO login may be vulnerable to this issue. This issue is patched in 3.5.1. The fix was made using https://github.com/mattermost/xml-roundtrip-validator If upgrade to 3.5.1 is not possible, users should disable SSO authentication in Fleet.

CWE-290

How to fix

Remediation Available

fleetNVD

Affected:< 3.5.1Fixed in:3.5.1CVE-2020-26276derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

2.17%probability of exploitation in 30 days

80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory4

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.