What’s Vulnerable › Vulnerabilities

CVE-2021-36157

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-03 · updated 2026-06-17
• Weakness: CWE-22

Description

An issue was discovered in Grafana Cortex through 1.9.0. The header value X-Scope-OrgID is used to construct file paths for rules files, and if crafted to conduct directory traversal such as ae ../../sensitive/path/in/deployment pathname, then Cortex will attempt to parse a rules file at that location and include some of the contents in the error message. (Other Cortex API requests can also be sent a malicious OrgID header, e.g., tricking the ingester into writing metrics to a different location, but the effect is nuisance rather than information disclosure.)

Affected products

• cortexproject cortex: through 1.9.0

References

• https://github.com/cortexproject/cortex/pull/4375
• https://grafana.com/docs/grafana/latest/release-notes/
• https://github.com/cortexproject/cortex/pull/4375
• https://grafana.com/docs/grafana/latest/release-notes/

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