CVE-2026-126307 json
Nezha Dashboard before 2.6.0 Multiple Authorization and Tenant Isolation Flaws
published 19d ago modified yesterday also EUVD-2026-125213 , GHSA-63mg-cxm4-98q3
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository nezhahq/nezha. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Is CVE-2026-126307 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- yesterday
Exploit prediction
0.64% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-14).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | 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 |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 4.0 | 8.7 | 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 |
Affected products
- nezhahq nezha
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/nezhahq/nezha/commit/027bfcf6521f192635b946b7583c3ab39500ab98
patch
-
github.com
/nezhahq/nezha/commit/7cd0371b56f7bce83c3953b2bf4711b2105d5818
patch
-
github.com
/nezhahq/nezha/security/advisories/GHSA-63mg-cxm4-98q3
vendor-advisory, advisory
-
vulncheck.com
/advisories/nezha-dashboard-before-2.6.0-multiple-authorization-and-tenant-isolation-flaws
third-party-advisory
Sources
- CVE List CVE-2026-126307
- NVD CVE-2026-126307
- Maintainer advisory GHSA-63mg-cxm4-98q3
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of nezhahq/nezha published their own advisory on GitHub. Reviewed sources take precedence over it.