CVE-2026-76362: Splunk SOAR Information Disclosure Flaw

CVE-2026-76362 Overview

CVE-2026-76362 is a certificate validation vulnerability in Splunk SOAR versions below 8.6.0. The CyberArk Representational State Transfer (REST) client does not verify server certificates by default. An unauthenticated attacker with network-path interception capability between Splunk SOAR and the configured CyberArk REST server can access or modify credential data exchanged through the password vault integration. The flaw is categorized under [CWE-295: Improper Certificate Validation].

Critical Impact
Attackers positioned on the network path can intercept or tamper with credentials retrieved from CyberArk, exposing every secret managed through the integration.

Affected Products

Splunk SOAR versions below 8.6.0
Splunk SOAR on-premises deployments using CyberArk REST credential manager
Splunk SOAR Cloud deployments configured with CyberArk password vault

Discovery Timeline

2026-08-19 - CVE-2026-76362 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-76362

Vulnerability Analysis

Splunk SOAR integrates with CyberArk as an external password vault to retrieve credentials used during playbook execution. The integration relies on a REST client that establishes TLS connections to the configured CyberArk server. In versions below 8.6.0, this client omits server certificate verification by default. As a result, the client accepts any certificate presented during the TLS handshake, including self-signed or attacker-controlled certificates.

An attacker positioned between Splunk SOAR and the CyberArk REST endpoint can present a fraudulent certificate, terminate the TLS session, and proxy traffic. The attacker gains full read and write access to credential requests and responses. This exposes every secret CyberArk returns to SOAR and allows injection of substituted credentials into downstream automations.

The attack requires network interception capability, which raises attack complexity. However, no authentication or user interaction is required, and the confidentiality and integrity impact on returned credentials is substantial.

Root Cause

The root cause is the absence of default TLS server certificate validation in the CyberArk REST client implementation shipped with Splunk SOAR. Certificate chain validation, hostname verification, and trust store enforcement are not performed unless explicitly configured, violating secure-by-default TLS handling expectations.

Attack Vector

Exploitation requires a network position that allows the attacker to observe or modify traffic between Splunk SOAR and the CyberArk REST server. Suitable positions include compromised routers, ARP spoofing on a shared segment, rogue DNS responses, BGP hijacks, or a compromised upstream proxy. Once positioned, the attacker performs a machine-in-the-middle attack against the TLS session and reads or rewrites credential exchanges.

No verified proof-of-concept code is publicly available.
Refer to Splunk Security Advisory SVD-2026-0804 for technical details.

Detection Methods for CVE-2026-76362

Indicators of Compromise

Unexpected TLS certificates presented by the configured CyberArk REST endpoint, particularly self-signed or unknown-issuer certificates
Anomalous CyberArk credential retrieval events in Splunk SOAR audit logs that do not correlate with scheduled playbook activity
Unauthorized use of credentials retrieved through the CyberArk integration in downstream systems

Detection Strategies

Perform out-of-band TLS certificate pinning checks against the CyberArk REST endpoint from the SOAR host to detect certificate substitution
Compare CyberArk server certificate fingerprints observed in network telemetry against the known-good fingerprint
Correlate playbook execution timelines with CyberArk credential retrieval logs to identify unexplained fetches

Monitoring Recommendations

Enable TLS inspection logging on network paths between Splunk SOAR and CyberArk and alert on unexpected certificate issuers
Monitor for ARP, DNS, and routing anomalies on network segments carrying SOAR-to-CyberArk traffic
Review CyberArk audit trails for credential retrievals originating from the SOAR service account

How to Mitigate CVE-2026-76362

Immediate Actions Required

Upgrade Splunk SOAR to version 8.6.0 or later as documented in Splunk Security Advisory SVD-2026-0804
Rotate all credentials that have been retrieved through the CyberArk integration on affected SOAR instances
Restrict network paths between Splunk SOAR and CyberArk to trusted, segmented links

Patch Information

Splunk has addressed CVE-2026-76362 in Splunk SOAR 8.6.0. The fix enables server certificate verification by default in the CyberArk REST client. Administrators should consult the Splunk Security Advisory SVD-2026-0804 for upgrade guidance and version-specific instructions. Additional configuration details are available in the Splunk documentation for managing organizational credentials with a password vault.

Workarounds

Route CyberArk REST traffic through a dedicated, isolated network segment that eliminates opportunities for machine-in-the-middle positioning
Terminate the SOAR-to-CyberArk connection through a mutually authenticated TLS reverse proxy that enforces certificate validation on behalf of the client
Restrict outbound network access from the SOAR host to only the known IP address of the CyberArk REST server

bash

# Example: restrict SOAR egress to CyberArk REST endpoint only
iptables -A OUTPUT -p tcp -d <cyberark_rest_ip> --dport 443 -j ACCEPT
iptables -A OUTPUT -p tcp --dport 443 -j DROP