CVE-2021-27358Network attack vector

Service interruption via anonymous snapshot creation

Published Mar 18, 2021 · Updated Aug 3, 2024

Denial of service in Grafana 6.7.3 through 7.4.1 allows remote attackers to interrupt the server through the snapshot API. SnapshotPublicModeOrSignedIn invoked ReqSignedIn but failed to reject requests when IsSignedIn remained false, permitting anonymous snapshot creation. The vulnerable state requires a commonly used but publicly unnamed configuration; public sources do not distinguish a hang, crash, or other interruption.

CVSS severityUnavailable
Unscored
EPSS probability83.04%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Grafana 6.7.3 through 7.4.1 allows remote attackers to interrupt the server through the snapshot API. SnapshotPublicModeOrSignedIn invoked ReqSignedIn but failed to reject requests when IsSignedIn remained false, permitting anonymous snapshot creation. The vulnerable state requires a commonly used but publicly unnamed configuration; public sources do not distinguish a hang, crash, or other interruption.

The record

CVE
CVE-2021-27358
Published
Mar 18, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 18, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.9GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H/E:U/RL:O/RC:R

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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