CVE-2026-21726

ADVISORY - github

Summary

The CVE-2021-36156 fix validates the namespace parameter for path traversal sequences after a single URL decode, by double encoding, an attacker can read files at the Ruler API endpoint /loki/api/v1/rules/{namespace}

Thanks to Prasanth Sundararajan for reporting this vulnerability.

EPSS Score⁠: 0.00015 (0.033)

Common Weakness Enumeration (CWE)

ADVISORY - nist

CWE-22⁠

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

ADVISORY - github

CWE-22⁠

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-601⁠

URL Redirection to Untrusted Site ('Open Redirect')

Impacted images

Advisories

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