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TI-2026-79014 Aliases CVE-2026-76288GHSA-hcwv-2x2x-8285

Denial of service through Splunk Web header parsing in Splunk Enterprise

Priority LOW 39CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-400.

Summary

Splunk Enterprise versions from 10.4 before 10.4.4, from 10.2 before 10.2.8, from 10.0 before 10.0.11, and from 9.4 before 9.4.16 are affected. Splunk Web does not limit request-header parsing before processing a request, which is a case of uncontrolled resource consumption (CWE-400). An unauthenticated remote attacker can send a single crafted request to the Splunk Web JavaScript logger endpoint, causing Splunk Web to stop responding until Splunk Enterprise is restarted.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00472 41st percentileScored 2026-11-07
Fix Fixed Splunk Enterprise (Splunk): 10.4.4, 10.2.8, 10.0.11 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SplunkSplunk Enterprise10.4 to before 10.4.4; 10.2 to before 10.2.8; 10.0 to before 10.0.11; 9.4 to before 9.4.1610.4.4, 10.2.8, 10.0.11, 9.4.16Patch availableCNA
  • Splunk Enterprise VendorSplunk Affected 10.4 to before 10.4.4; 10.2 to before 10.2.8; 10.0 to before 10.0.11; 9.4 to before 9.4.16 Fixed in 10.4.4, 10.2.8, 10.0.11, 9.4.16 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*9.4.0 to before 9.4.16; 10.0.0 to before 10.0.11; 10.2.0 to before 10.2.8; 10.4.0 to before 10.4.4VulnerableSplunk
  • cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* Versions 9.4.0 to before 9.4.16; 10.0.0 to before 10.0.11; 10.2.0 to before 10.2.8; 10.4.0 to before 10.4.4 Vulnerable ·Splunk

Remediation

Upgrade Splunk Enterprise to 10.4.4, 10.2.8, 10.0.11, or 9.4.16, depending on the release branch in use. The sources list no advisory identifier for this fix.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Splunk Enterprise (Splunk) Fixed in 10.4.4, 10.2.8, 10.0.11, 9.4.16

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Splunk Enterprise 10.0.11, 10.2.8 and 2 more versions

    12 records Highest priority Priority MEDIUM 5 MEDIUM, 7 LOW

    Other records, highest priority first

    • TI-2026-79027 Protection mechanism failure in Splunk EnterprisePriority MEDIUM 49
    • TI-2026-79038 Improper neutralization flaws in Splunk Enterprise hardening releasePriority MEDIUM 43
    • TI-2026-79025 Improper access control in Splunk EnterprisePriority MEDIUM 43
    Show all 12 records →

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-76288
  2. 2026-10-22 Alias added: GHSA-hcwv-2x2x-8285
  3. 2026-10-22 CISA SSVC decision points changed
  4. 2026-10-22 Priority changed: MEDIUM → LOW

References

Advisory 1

  • TI-2026-16444 Unauthenticated Arbitrary File Creation and Truncation in a PostgreSQL Sidecar Service Endpoint in Splunk Enterprise KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-00154 The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly… KEVCVSS 3.1HIGH 7.5
  • TI-2023-24841 Remote code execution (RCE) in Splunk Enterprise through Insecure XML Parsing CVSS 3.1HIGH 8.8
  • TI-2023-15979 ‘edit_user’ Capability Privilege Escalation CVSS 3.1HIGH 8.8
  • TI-2024-30707 Remote Code Execution (RCE) due to insecure session storage configuration in Splunk Enterprise on Windows CVSS 3.1HIGH 8.8
  • TI-2022-21345 Reflected Cross-Site Scripting via the radio template in Splunk Enterprise CVSS 3.1HIGH 8.8
See all 297 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences