CVE-2026-126307 is a high-severity (CVSS 7.5) Incorrect Authorization vulnerability in nezhahq nezha. A fix is available — see the affected versions and patch details below.
Nezha Dashboard before 2.6.0 contains multiple authorization, tenant isolation, and resource exhaustion vulnerabilities that allow members or unauthenticated attackers to abuse NAT,…
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Description
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.
Affected Products
nezhanezhahqDetection & mitigation playbook
Vendor / applianceDetect
Inventory every nezhahq nezha deployment and check each version against the affected-products list above.
Fix
Apply the nezhahq nezha security patch or hotfix for CVE-2026-126307 on the affected version, following the vendor advisory for your exact build.
Workarounds
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2026-126307 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.