Splunk Enterprise up to 9.4.15/10.0.10/10.2.7/10.4.3 JavaScript Logger Endpoint input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k1.16

Summaryinfo

A vulnerability was found in Splunk Enterprise up to 9.4.15/10.0.10/10.2.7/10.4.3 and classified as problematic. Affected by this issue is some unknown functionality of the component JavaScript Logger Endpoint. Such manipulation leads to input validation. This vulnerability is referenced as CVE-2026-76288. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Splunk Enterprise up to 9.4.15/10.0.10/10.2.7/10.4.3 and classified as problematic. Affected by this issue is an unknown code of the component JavaScript Logger Endpoint. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. CVE summarizes:

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.

The advisory is available at advisory.splunk.com. This vulnerability is handled as CVE-2026-76288 since 08/19/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available.

Upgrading to version 9.4.16, 10.0.11, 10.2.8 or 10.4.4 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (cisco): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Enterprise 9.4.16/10.0.11/10.2.8/10.4.4

Timelineinfo

08/19/2026 CVE reserved
10/21/2026 +63 days VulDB entry created
10/22/2026 +0 days Advisory disclosed
10/22/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: advisory.splunk.com
Status: Confirmed

CVE: CVE-2026-76288 (🔒)
GCVE (CVE): GCVE-0-2026-76288
GCVE (VulDB): GCVE-100-425030

Entryinfo

Created: 10/22/2026 01:12
Changes: 10/22/2026 01:12 (64)
Complete: 🔍
Cache ID: 216::103

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