Apache NiFi is a cornerstone technology for many enterprises, automating the flow of data between systems. Today, we are analyzing CVE-2026-68980, a Critical vulnerability (CVSS 9.1) impacting Apache NiFi versions 2.0.0 through 2.10.0. This flaw allows attackers to bypass authorization checks and delete critical assets associated with Parameter Contexts via the REST API. For organizations relying on NiFi for sensitive data logistics, this represents a significant integrity risk requiring immediate remediation.
Technical Analysis
CVE Identifier: CVE-2026-68980
CVSS Score: 9.1 (Critical)
Affected Products: Apache NiFi
Affected Versions: 2.0.0 through 2.10.0
Vector: Network (N)
The Vulnerability Mechanism
The vulnerability resides in the REST API endpoint responsible for managing assets within Parameter Contexts. Specifically, the framework fails to correctly verify ownership during deletion requests.
When a deletion request is received, the application performs authorization checks based on the Parameter Context Identifier and Asset Identifier supplied by the user in the request payload. The flaw lies in the logic: the system verifies authorization against the supplied identifiers without sufficiently cross-referencing them against the stored identifiers linked to the actual asset owner. This creates an Insecure Direct Object Reference (IDOR) condition.
If an attacker has access to the NiFi API (even with limited privileges) and can enumerate or guess valid IDs for Parameter Contexts outside their authorized scope, they can send a crafted DELETE request to remove assets (such as sensitive parameter files) belonging to other contexts.
Note on Exploitation: While the NVD summary notes that installations without granular authorization across Parameter Contexts are not technically susceptible, this is a dangerous assumption. In a production environment, the loss of segmentation logic creates a single point of failure for data integrity.
Detection & Response
Detecting this vulnerability requires monitoring for abuse of the REST API endpoints responsible for asset management. Since this is an application-layer logic flaw, we focus on identifying suspicious HTTP DELETE methods targeting the specific NiFi API paths.
SIGMA Rules
---
title: Potential CVE-2026-68980 Exploitation - NiFi Asset Deletion
id: 8a4d9e11-2c4f-4a9b-b1c5-6e7f8a901234
status: experimental
description: Detects attempts to delete Parameter Context Assets in Apache NiFi via REST API, indicative of potential exploitation of CVE-2026-68980.
references:
- https://nvd.nist.gov/vuln/detail/CVE-2026-68980
author: Security Arsenal
date: 2026/04/22
tags:
- attack.initial_access
- attack.webshell
- cve.2026.68980
logsource:
category: web
product: apache
detection:
selection:
Method|contains: 'DELETE'
UrlPath|contains:
- '/nifi-api/parameter-contexts'
- '/parameter-contexts'
UrlPath|contains:
- '/assets'
condition: selection
falsepositives:
- Legitimate administrative deletion of NiFi assets by authorized staff
level: high
---
title: NiFi REST API Access from Suspicious Source IPs
id: 9b5e0f22-3d5g-5b0c-c2d6-7f8g9a012345
status: experimental
description: Identifies access to the NiFi API Parameter Context endpoints from IP addresses not typically seen in the environment baseline.
references:
- https://nvd.nist.gov/vuln/detail/CVE-2026-68980
author: Security Arsenal
date: 2026/04/22
tags:
- attack.command_and_control
- attack.t1071
logsource:
category: proxy
product: null
detection:
selection:
cs-method: 'DELETE'
cs-uri-stem|contains: '/parameter-contexts'
filter:
c-ip|startswith:
- '10.'
- '192.168.'
condition: selection and not filter
falsepositives:
- Authorized administrators accessing via VPN or new network segments
level: medium
KQL (Microsoft Sentinel / Defender)
// Hunt for suspicious DELETE requests on NiFi Parameter Contexts
// Using CommonSecurityLog (CEF/Proxy) or Syslog
CommonSecurityLog
| where FileProtocol in ("http", "https")
| where RequestMethod =~ "DELETE"
| where RequestURL contains "/parameter-contexts"
and RequestURL contains "/assets"
| project TimeGenerated, DeviceName, SourceIP, DestinationIP, RequestURL, RequestMethod
| extend AlertContext = "Potential CVE-2026-68980 Exploitation Attempt"
Velociraptor VQL
-- Hunt for Apache NiFi configuration and version details to assess vulnerable instances
SELECT FullPath, Mtime, Size
FROM glob(globs="/opt/nifi/conf/nifi.properties")
WHERE FullPath =~ "nifi.properties"
-- Additionally, check for running Java processes indicative of NiFi
SELECT Pid, Name, CommandLine, Exe
FROM pslist()
WHERE Name =~ "java" AND CommandLine =~ "nifi"
Remediation Script (Bash)
#!/bin/bash
# Remediation Script for CVE-2026-68980
# Checks Apache NiFi version and recommends upgrade if vulnerable
NIFI_USER="nifi"
NIFI_HOME="/opt/nifi" # Adjust path if different
VULN_RANGE="2.0.0 2.10.0"
# Check if NiFi is running
if pgrep -f "nifi" > /dev/null; then
echo "[+] Apache NiFi process detected."
else
echo "[-] Apache NiFi process not detected. Exiting."
exit 0
fi
# Check version in nifi.properties
if [ -f "$NIFI_HOME/conf/nifi.properties" ]; then
echo "[+] Found NiFi configuration at $NIFI_HOME/conf/nifi.properties"
# Extracting version (NiFi often doesn't put version in properties, checking bin/nifi.sh version output)
VERSION_OUTPUT=$(su - $NIFI_USER -c "$NIFI_HOME/bin/nifi.sh version" 2>/dev/null | grep -i "Version" || echo "Unknown")
echo "[+] Version Info: $VERSION_OUTPUT"
# Note: Automated version parsing is brittle. This script highlights the need for manual verification.
echo "[!] ACTION REQUIRED: Verify if the installed version is between 2.0.0 and 2.10.0."
echo "[!] If vulnerable, upgrade Apache NiFi to version 2.10.1 or later immediately."
else
echo "[-] Could not find nifi.properties. Please verify installation path."
fi
# Temporary Mitigation: Restrict Network Access
echo "[!] Recommendation: Restrict network access to the NiFi API (ports 8080/8443) to trusted management subnets only until patching is complete."
Remediation
- Patch Immediately: Upgrade Apache NiFi to version 2.10.1 or the latest available version. The vendor has addressed the incomplete authorization check in the REST API controller.
- Vendor Advisory: Refer to the official Apache NiFi Security Advisory for CVE-2026-68980 for the specific patch release notes.
- Network Segmentation: As a defense-in-depth measure, ensure that the NiFi REST API ports (default 8080 HTTP, 8443 HTTPS) are not exposed to the public internet. Access should be restricted to specific management jump hosts or VPNs.
- Review Authorization Policies: Even after patching, review your Parameter Context authorization settings. Ensure that users are granted the minimum necessary permissions (Least Privilege) to prevent impact from future logic flaws.
Related Resources
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