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CVE-2026-76288

7.5, high

Splunk Enterprise Uncontrolled Resource Consumption Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.5, high high CVSS v3.1
EPSS, next 30 days
0.4% higher than 29.9% of scored CVEs
Exploitation
No public evidence
Published
21 Oct 20262 days ago

Description

In Splunk Enterprise versions below 10.4.4, 10.2.8, 10.0.11, and 9.4.16, an unauthenticated user could send a single crafted request to the Splunk Web JavaScript logger endpoint and cause Splunk Web to stop responding to requests. Splunk Web remains unavailable until Splunk Enterprise is restarted. The vulnerability is possible because Splunk Web does not limit request-header parsing before processing the request.

Details

Vendor
Splunk
Product
Splunk Enterprise
Weakness
CWE-400 (opens in a new tab)
Status
Received
Updated
21 Oct 2026
Assigner
psirt@cisco.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References 1

Advisories 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Splunk CVEs

Every Splunk CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-20253 Splunk Enterprise Missing Authentication for Critical Function Vulnerability KEV EPSS 97% 9.8, critical
  • CVE-2026-76290 Splunk Enterprise Uncontrolled Resource Consumption Vulnerability EPSS 0.4% 7.5, high
  • CVE-2026-76291 Splunk Enterprise Improper Access Control Vulnerability EPSS 0.3% 8.8, high
  • CVE-2026-76293 Splunk Enterprise Code Injection Vulnerability EPSS 0.3% 7.2, high
  • CVE-2026-76298 In Splunk Enterprise versions below 10.4.4 and 10.2.8, a user who does not hold the "admin" or "power" Splunk roles could derive the… EPSS 0.3% 8.8, high
  • CVE-2026-76306 Splunk SOAR Exposure of Sensitive Information Vulnerability EPSS 0.2% 7.5, high
  • CVE-2026-76307 Splunk SOAR Exposure of Sensitive Information Vulnerability EPSS 0.3% 7.2, high
  • CVE-2026-76285 As part of Cisco's ongoing commitment to proactive security and product quality, Cisco has conducted a comprehensive internal security… EPSS 0.3% 9.8, critical

Beyond this page

Is CVE-2026-76288 in your network?

This page tells you how dangerous CVE-2026-76288 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-76288 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 23 Oct 2026, not the live upstream state.