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Vulnerabilities

Vulnerability · CVE-2020-9321

configurationwatcher.go in Traefik 2.x before 2.1.4 and TraefikEE 2.0.0 mishandles the purging of certificate contents from providers before logging.

Published Mar 16, 2020 · catalog updated Jun 17, 2026 · configurationwatcher.go in Traefik 2.x

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2020-9321. EPSS is 0.74%. Act only if a listed version of configurationwatcher.go in Traefik 2.x is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (configurationwatcher.go in Traefik 2.x).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.74%
Remediation
Version ranges on file
Affected products
cpe traefik/traefik · cpe traefik/traefik enterprise

configurationwatcher.go in Traefik 2.x before 2.1.4 and TraefikEE 2.0.0 mishandles the purging of certificate contents from providers before logging.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe traefik/traefik>= 2.0.0, <= 2.1.4
  • cpe traefik/traefik enterprise2.0.0

How to fix CVE-2020-9321

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2020-9321. EPSS is 0.74%. Act only if a listed version of configurationwatcher.go in Traefik 2.x is installed.

Which versions are affected?

Compare what you have installed with traefik/traefik enterprise 2.0.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-295: Improper Certificate Validation. EPSS 0.74%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Traefik security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 16, 2020 · Monitored products — high

    Detected

    configurationwatcher.go in Traefik 2.x before 2.1.4 and TraefikEE 2.0.0 mishandles the purging of certificate contents from providers before logging.

  2. Jun 17, 2026 · Monitored products — high

    Updated

    configurationwatcher.go in Traefik 2.x before 2.1.4 and TraefikEE 2.0.0 mishandles the purging of certificate contents from providers before logging.

Sources

  • CVE.orgVulnerability recordCVE-2020-9321

    Official CVE identifier

    cve.org
  • Monitored products — highVendor advisoryCVE-2020-9321

    configurationwatcher.go in Traefik 2.x before 2.1.4 and TraefikEE 2.0.0 mishandles the purging of certificate contents from providers before logging.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • Monitored products — highNov 2, 2026