PT-2020-20211 · Linux Foundation+3 · Kubernetes+2

Patrick Rhomberg · Published 2020-10-15 · Updated 2026-04-01 · CVE-2020-8565

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Kubernetes versions prior to v1.20.0-alpha2 Kubernetes versions 1.19.3 and earlier Kubernetes versions 1.18.10 and earlier Kubernetes versions 1.17.13 and earlier

Description In Kubernetes, if the logging level is set to at least 9, authorization and bearer tokens will be written to log files. This can occur both in API server logs and client tool output like kubectl.

Recommendations For versions prior to v1.20.0-alpha2, consider reducing the logging level to prevent sensitive information from being written to log files. For versions 1.19.3 and earlier, update to a version later than v1.19.3 to mitigate the risk. For versions 1.18.10 and earlier, update to a version later than v1.18.10 to mitigate the risk. For versions 1.17.13 and earlier, update to a version later than v1.17.13 to mitigate the risk. As a temporary workaround, consider disabling debug-level logging until a patch is available.

Fix

Insertion into Log File

Weakness Enumeration

CWE-532

Related Identifiers

ALT-PU-2021-1227

ALT-PU-2021-1495

ALT-PU-2022-1245

AZL-41878

CLEANSTART-2026-GI67088

CLEANSTART-2026-TC31671

CVE-2020-8565

GHSA-8CFG-VX93-JVXW

GO-2021-0064

RHSA-2021:5085

SUSE-SU-2020:3760-1

Affected Products

Alt Linux

Kubernetes

Suse

References · 71

• https://groups.google.com/g/kubernetes-security-discuss/c/vm-HcrFUOCs/m/36utxAM5CwAJ · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-27139 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-27142 · Security Note
• https://osv.dev/vulnerability/GO-2021-0064 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-8565 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-27137 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2020-8565 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-8559 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-8565 · Vendor Advisory
• https://osv.dev/vulnerability/AZL-41878 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-61726 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-25679 · Security Note
• https://osv.dev/vulnerability/CLEANSTART-2026-TC31671 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-8565 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-8cfg-vx93-jvxw · Vendor Advisory