Vulnerability in Splunk Enterprise

[ Description ]Official 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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• CERT-FR22 Oct 2026CERTFR-2026-AVI-1366

  Multiple vulnerabilities in Splunk products Translated from French

  Multiple vulnerabilities have been discovered in Splunk products. Some of them allow an attacker to cause arbitrary code execution, a breach of data confidentiality and remote cross-site scripting (XSS).

  CVE-2026-76298CVE-2026-42308CVE-2026-76295+108 more CVEs
• BSI CERT-Bund21 Oct 2026WID-SEC-2026-4102

  Splunk Splunk Enterprise: Multiple vulnerabilities Translated from German

  Risk highCVE-2026-76294CVE-2026-76289CVE-2026-76300+13 more CVEs

[ References ]References

• advisory.splunk.com/advisories/SVD-2026-1007