---
id: "CVE-2026-76290"
kind: "vulnerability"
aliases: ["CVE-2026-76290"]
title: "Splunk Enterprise: unauthenticated requests can exhaust resources and halt the daemon"
severity: "high"
cvss: 7.5
epss: 0.00406
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["edge-processor", "runtime", "self-hosted", "splunk", "splunk-enterprise"]
not_affected_if: ["fixed-version"]
published_at: "2026-10-21T23:17:26+00:00"
first_seen_at: "2026-10-23T21:57:29+00:00"
updated_at: "2026-10-25T03:16:22+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76290", "first_seen_at": "2026-10-23T21:57:29+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-76290", "first_seen_at": "2026-10-24T13:15:54+00:00"}]
---

# Splunk Enterprise: unauthenticated requests can exhaust resources and halt the daemon

Splunk Enterprise's Edge Processor package download endpoint in the Pipeline Builders app accepts requests without authentication. Each request loads and base64-encodes the whole package in memory, so repeated requests can exhaust system resources and make the Splunk daemon stop responding.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the Splunk Enterprise version with `splunk version` and compare it against the fixed releases in the sources (10.4.4, 10.2.8, 10.0.11).
- Confirm whether Edge Processor is in use on the instance, since the endpoint belongs to the Pipeline Builders app for Edge Processor packages.

## Fix

- Upgrade Splunk Enterprise to `10.4.4`, `10.2.8`, or `10.0.11` depending on the release branch in use.
- After upgrading, prepare all existing Edge Processor instances, turn on authentication for Edge Processor package downloads, and restart Splunk Enterprise, following the Splunk help page for enabling authentication for Edge Processor package downloads.

## Timeline

- 2026-10-23T21:57:29+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-76290
- 2026-10-24T13:15:54+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-76290

## From the sources

In Splunk Enterprise versions below 10.4.4, 10.2.8, and 10.0.11, an unauthenticated user could send repeated requests to the Edge Processor package download endpoint in the Splunk Pipeline Builders app. The requests could cause the Splunk daemon to consume excessive system resources and potentially stop responding.
The vulnerability is possible because the endpoint accepts package download requests without authentication and reads and base64-encodes the complete package in memory for each request.
After upgrading, prepare all existing Edge Processor instances, turn on authentication for Edge Processor package downloads, and restart Splunk Enterprise. For more information, see Enable authentication for Edge Processor package downloads (https://help.splunk.com/en/data-management/process-data-at-the-edge/use-edge-processors-for-splunk-enterprise/10.4/administer-edge-processors/enable-authentication-for-edge-processor-package-downloads).

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_