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CVE-2021-36157

20
FAUCET Score

CVE-2021-36157 is a directory traversal vulnerability in Grafana Cortex through version 1.9.0. An unauthenticated attacker can craft the X-Scope-OrgID header to include directory traversal sequences, causing Cortex to attempt parsing rules files from arbitrary paths and disclose partial contents in error messages. Rated Medium severity (CVSS 5.3), this vulnerability has a low impact on confidentiality and no impact on integrity or availability. There is no public exploit code, active exploitation, or significant community discussion reported for this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.9.0CPE matchmatch criteria
cpe:2.3:a:linuxfoundation:cortex:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.39%
Probability of exploitation in next 30 days
EPSS Percentile
69.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0139 is in the 51st percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 4.13Fixed in: openshift4/ose-cluster-storage-operator:v4.13.0-202305181415.p0.g6479617.assembly.stream
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 4.14Fixed in: openshift4/ose-cluster-storage-operator:v4.14.0-202310201027.p0.gdbb1514.assembly.stream
View patch
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/ose-grafana

Vendor Advisories (2)

goGHSA-jphm-g89m-v42pmedium

Path traversal in Grafana Cortex

Sep 2, 2021
redhatCVE-2021-36157Moderate

cortex: Grafana Cortex directory traversal

Jul 22, 2021

References

github.com / cortexproject/cortex/pull/4375
PatchThird Party Advisory
grafana.com / docs/grafana/latest/release-notes
Release NotesVendor Advisory