Is CVE-2026-76303 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-76303 being exploited in the wild.

How severe is CVE-2026-76303?

Medium severity, with a CVSS score of 5.7, published 21 October 2026.

Is there a fix for CVE-2026-76303?

Yes: fixed in 8.7.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-76303 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-76303?

Check whether you run Splunk SOAR at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-76303: Splunk SOAR stored cross-site scripting in app documentation

CVE-2026-76303 · Severity: medium · CVSS 5.7 · Published 2026-10-21

Splunk SOAR is a security orchestration platform that manages and coordinates responses to security incidents. An attacker with app installation privileges can inject malicious code into app documentation that executes when another user views it, allowing the attacker to steal data or perform actions on behalf of that user. The attack requires social engineering to trick users into opening a malicious app.

Technologies: Splunk SOAR. Vendors: Splunk.

Quick answers

Is CVE-2026-76303 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-76303 being exploited in the wild.
How severe is CVE-2026-76303?: Medium severity, with a CVSS score of 5.7, published 21 October 2026.
Which products and versions are affected?: Splunk SOAR below 8.7.0.
Is there a fix for CVE-2026-76303?: Yes: fixed in 8.7.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-76303 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-76303?: Check whether you run Splunk SOAR at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 8.7.0

Technical details

A stored cross-site scripting (XSS) vulnerability exists in Splunk SOAR's app documentation display functionality. An authenticated user with the install_apps capability can craft a malicious app with unsanitized content in its documentation; when another authenticated user with app-viewing permissions opens the documentation, the injected script executes in their browser context. The attacker gains the ability to access data and perform actions with the victim's permissions, though exploitation requires social engineering.

Affected products

Splunk SOAR below 8.7.0

Timeline

2026-10-21: disclosed

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