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Vulnerability record

CVE-2026-126307

highCVSS 4.0 8.7Published · nezhahq

The short answer

CVE-2026-126307 affects nezhahq nezha and is rated high (CVSS 8.7). It is not in CISA's Known Exploited Vulnerabilities catalog.

What it is

Nezha Dashboard before 2.6.0 contains multiple authorization, tenant isolation, and resource exhaustion vulnerabilities that allow members or unauthenticated attackers to abuse NAT, DDNS, OAuth, cron, and server transfer features. Attackers can claim undeclared Dashboard hostnames to capture login bodies, hijack DDNS profiles, create executable schedules without exec scope, or exhaust memory via buffered NAT requests.

Weakness: CWE-863.

Severity

8.7 high

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Exploited (CISA KEV)

Not listed

CISA lists confirmed exploitation only

EPSS, next 30 days

No score

FIRST scores CVEs within a day of publication

How it can be exploited

Attack vector
Network
Attack complexity
Low
Attack requirements
None
Privileges required
None
User interaction
None
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Affected products

nezha. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2026-126307 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog as of 2026-11-13.

How do I fix CVE-2026-126307?

Follow the vendor advisory in the references below. NVD lists the affected versions under its configurations.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Deferred. The description is NVD's text, quoted as published.

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