How severe is CVE-2026-49397?

CVE-2026-49397 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-49397 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-49397?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-49397 have an EU (EUVD) identifier?

Yes. CVE-2026-49397 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36597.

When was CVE-2026-49397 published?

CVE-2026-49397 was published on 2026-06-12 and last updated on 2026-06-17.

CVE-2026-49397

CVE-2026-49397 is a medium-severity vulnerability with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36597
Weakness: CWE-200
Published: 2026-06-12
Last modified: 2026-06-17

Description

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.0 to before version 2.0.14, private services (`EnableShowInService: false`) are enumerable via per-server endpoints, leaking name and timing data. This issue has been patched in version 2.0.14.

Frequently asked questions

What is CVE-2026-49397?: Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.0 to before version 2.0.14, private services (`EnableShowInService: false`) are enumerable via per-server endpoints, leaking name and timing data. This issue has been patched in version 2.0.14.
How severe is CVE-2026-49397?: CVE-2026-49397 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-49397 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-49397?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-49397 have an EU (EUVD) identifier?: Yes. CVE-2026-49397 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36597.
When was CVE-2026-49397 published?: CVE-2026-49397 was published on 2026-06-12 and last updated on 2026-06-17.

References

https://github.com/nezhahq/nezha/security/advisories/GHSA-vrmh-5mmx-hjwx

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