CVE-2026-76390 Information Disclosure through Splunk Web in Cisco Talos Intelligence for Enterprise Security Cloud
Unauthenticated attackers can access OpenAPI specifications via Splunk Web, exposing REST API details for reconnaissance.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76390?
CVE-2026-76390 is a medium-severity vulnerability in Splunk Cisco Talos Intelligence for Enterprise Security Cloud, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Cisco Talos Intelligence for Enterprise Security Cloud versions below 1.0.3, an unauthenticated user could access the add-on OpenAPI specification through Splunk Web static file paths. The exposed specification could allow for reconnaissance of the add-on Representational State Transfer (REST) API endpoints and authentication model. The vulnerability is possible because the generated OpenAPI specification is packaged in a static file path that Splunk Web serves without authentication. For more information see Deploy Cisco Talos Intelligence for Splunk Enterprise Security (https://help.splunk.com/en/splunk-enterprise-security-8/user-guide/8.0/introduction/deploy-cisco-talos-intelligence-for-splunk-enterprise-security-cloud-only) in the Splunk documentation.
Weakness: CWE-200
Which versions are affected by CVE-2026-76390?
It affects 1 product.
Products include Cisco Talos Intelligence for Enterprise Security Cloud.
How do I fix CVE-2026-76390?
No fix has been published for CVE-2026-76390 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-76390 being exploited?
There is no known exploitation of CVE-2026-76390 in the wild and no public exploit code.
Other vulnerabilities in Splunk Cisco Talos Intelligence for Enterprise Security Cloud
Sources
Also known as GHSA-x4c2-cp22-3gjj.