CVE-2026-49397Public exploitNetwork attack vectorHinoki check available

Unauthenticated service metadata disclosure via visibility bypass

Published Jun 12, 2026 · Updated Jun 12, 2026

Improper authorization in Nezha Monitoring 2.0.0 through 2.0.13 allows remote attackers to read private service names and timing data. The listServerServices and getServiceHistory handlers read raw ServiceSentinel objects without enforcing EnableShowInService and serialize hidden metadata. Unauthenticated access is sufficient, but server-based enumeration requires a public server ID; direct history lookups require a service ID.

CVSS severity5.3
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper authorization in Nezha Monitoring 2.0.0 through 2.0.13 allows remote attackers to read private service names and timing data. The listServerServices and getServiceHistory handlers read raw ServiceSentinel objects without enforcing EnableShowInService and serialize hidden metadata. Unauthenticated access is sufficient, but server-based enumeration requires a public server ID; direct history lookups require a service ID.

The record

CVE
CVE-2026-49397
Published
Jun 12, 2026
Updated
Jun 12, 2026
Vendor
NezhaHQ
Product
Nezha Monitoring
Classifications
CWE-863, CWE-285, CWE-200, T1190
Attack vector
network
Privileges
unauthenticated

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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=>= 2.0.0, < 2.0.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NezhaHQ · Nezha Monitoringversion=>= 2.0.0, < 2.0.14

Published CVSS scores

5.3GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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 exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-285Improper Authorization
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1190Exploit Public-Facing Application

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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