CVE-2026-53522Public exploitNetwork attack vector

Authenticated service interruption via unbounded stream allocation

Published Jun 12, 2026 · Updated Jun 12, 2026

Resource exhaustion in Nezha Monitoring before 2.2.0 allows remote authenticated users to interrupt dashboard and agent services. createTerminal and createFM place every requested stream in the unbounded NezhaHandler.ioStreams map, while attachments allocate relay goroutines, buffers, gRPC streams, and agent-side processes. Standard terminal or file-management scopes suffice; repeated requests exhaust resources, causing dashboard or agent crashes and lost monitoring.

CVSS severity6.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Nezha Monitoring before 2.2.0 allows remote authenticated users to interrupt dashboard and agent services. createTerminal and createFM place every requested stream in the unbounded NezhaHandler.ioStreams map, while attachments allocate relay goroutines, buffers, gRPC streams, and agent-side processes. Standard terminal or file-management scopes suffice; repeated requests exhaust resources, causing dashboard or agent crashes and lost monitoring.

The record

CVE
CVE-2026-53522
Published
Jun 12, 2026
Updated
Jun 12, 2026
Vendor
NezhaHQ
Product
Nezha Monitoring
Classifications
CWE-770, T1499.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.0.0, < 2.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

NezhaHQ · Nezha Monitoringversion=>= 1.0.0, < 2.2.0

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.003Application Exhaustion Flood

Public exploit references

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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