EUVD-2026-81075
GHSA-6ghg-hh2v-f99w
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/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:P/AU:Y/R:U/V:C/RE:X/U:X
Network-reachable API with low complexity, but requires a low-privileged account holding bucket write/delete rights (PR:L); arbitrary file write/delete gives I:H and A:H with no disclosure (C:N).
Primary rating from Vendor (CNA).
CVSS VectorVendor
Lifecycle Timeline
5Description PRE-NVD
AnalysisAI
Authenticated path traversal in Apache NiFi Registry 0.4.0 through 2.11.0 allows a user who is authorized to both write and delete extension bundles in a bucket to upload a NAR whose manifest carries crafted parent-directory group, artifact, or version coordinates, causing the default file persistence provider to perform file system operations outside the configured persistence directory. Impact is limited to integrity and availability (files created, overwritten, or deleted outside the storage root) rather than confidentiality or remote code execution, and exploitation requires a valid account with write-plus-delete bundle privileges on a deployment using the default file persistence provider. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated NiFi Registry account that is authorized to BOTH write and delete extension bundles within at least one bucket - this is the primary limiting factor and rules out anonymous or read-only users. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a moderate-to-serious authenticated integrity/availability flaw, not a critical unauthenticated RCE. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patch: Apache NiFi Registry 2.12.0 - upgrading to 2.12.0 is the recommended mitigation, as it rejects parent-directory coordinates and enforces that the normalized storage path remain a strict child of the file persistence root. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory every NiFi Registry deployment, confirm which instances run versions 0.4.0 through 2.11.0, and determine which of those use the default file persistence provider; immediately reduce the set of accounts holding simultaneous write-and-delete privileges on extension bundles in any bucket, capture a verified backup of all registry artifacts and persistence directories, and audit the persistence root and its parent directories for files that should not be there. …
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Same weakness CWE-22 – Path Traversal
View allSame technique Path Traversal
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External POC / Exploit Code
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