Loki
Monthly
Uncontrolled memory allocation in Grafana Loki lets remote unauthenticated users issue queries with excessively large limit values, forcing the service to allocate large amounts of memory and potentially exhausting host resources. The impact is denial of service (CVSS 7.5, A:H only) and varies by deployment topology - a single-binary or under-provisioned deployment is far more exposed than a horizontally scaled microservices setup. There is no public exploit identified at time of analysis and it is not listed in CISA KEV; note the input 'Information Disclosure' tag conflicts with the CVSS impact (C:N/I:N/A:H), which indicates an availability-only issue.
Path traversal in Grafana Loki 2.3.0 through 3.5.8 allows unauthenticated remote attackers to read arbitrary files on the server via double encoding of the namespace parameter in the Ruler API endpoint /loki/api/v1/rules/{namespace}. This bypasses the fix for CVE-2021-36156, which sanitized the parameter only after a single URL decode. While the CVSS base score is 5.3 (Medium), EPSS exploitation probability is extremely low (0.01%), and no active exploitation or public exploit code is known.
An issue was discovered in Grafana Loki through 2.2.1. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Path Traversal vulnerability could allow attackers to access files and directories outside the intended path.
Uncontrolled memory allocation in Grafana Loki lets remote unauthenticated users issue queries with excessively large limit values, forcing the service to allocate large amounts of memory and potentially exhausting host resources. The impact is denial of service (CVSS 7.5, A:H only) and varies by deployment topology - a single-binary or under-provisioned deployment is far more exposed than a horizontally scaled microservices setup. There is no public exploit identified at time of analysis and it is not listed in CISA KEV; note the input 'Information Disclosure' tag conflicts with the CVSS impact (C:N/I:N/A:H), which indicates an availability-only issue.
Path traversal in Grafana Loki 2.3.0 through 3.5.8 allows unauthenticated remote attackers to read arbitrary files on the server via double encoding of the namespace parameter in the Ruler API endpoint /loki/api/v1/rules/{namespace}. This bypasses the fix for CVE-2021-36156, which sanitized the parameter only after a single URL decode. While the CVSS base score is 5.3 (Medium), EPSS exploitation probability is extremely low (0.01%), and no active exploitation or public exploit code is known.
An issue was discovered in Grafana Loki through 2.2.1. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Path Traversal vulnerability could allow attackers to access files and directories outside the intended path.