CVE-2021-22133

Severity: low (CVSS 2.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-02-10 · updated 2026-06-17
Weakness: CWE-532

Description

The Elastic APM agent for Go versions before 1.11.0 can leak sensitive HTTP header information when logging the details during an application panic. Normally, the APM agent will sanitize sensitive HTTP header details before sending the information to the APM server. During an application panic it is possible the headers will not be sanitized before being sent.

Affected products

Elastic APM agent for Python: before 1.11.0 — fixed in 1.11.0

How to fix

Upgrade to a fixed version: Elastic APM agent for Python 1.11.0. Check the vendor advisory for mitigations.

References

https://discuss.elastic.co/t/elastic-apm-agent-for-go-1-11-0-security-update/263252
https://discuss.elastic.co/t/elastic-apm-agent-for-go-1-11-0-security-update/263252

Get alerted when CVE-2021-22133 or the next vulnerability affects your stack