CVE-2026-76324 — Stored Cross-Site Scripting (XSS) in Splunk Web Tours in Splunk Enterprise
In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, a user who holds the "power" Splunk role could create a malicious Splunk Web tour and cause arbitrary JavaScript to run in the browser of another user when that user opens a crafted tour link. The JavaScript runs in the browser of the affected user, allowing for access to all relevant data available to that user. The Cross-Site Scripting (XSS) vulnerability is possible because Splunk Web renders tour content and tour navigation links without sufficient output encoding and accepts a tour selector value that can be treated as markup. The vulnerability requires another user to open a crafted tour link. The user who holds the "power" Splunk role should not be able to trigger JavaScript execution in another user's browser without that user interaction.
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
How the score was calculated
- Technical severity (medium)+3
The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.
CISA SSVC assessment CISA
Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.
Remediation
Fixes and mitigations documented by the sources — linked to the original advisory.
- Documented mitigation — advisory.splunk.com (NIST National Vulnerability Database)
First 24 hours
Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.
- Identify exposed assets running the affected vendor/product/version combinations (Splunk Splunk, Splunk Splunk Enterprise).
- Apply the documented mitigations until a definitive fix is available.
- Exploitation requires user interaction: tighten email/web filtering and warn affected users.
- Search available logs for exploit probes matching the vulnerability class (cross-site scripting), errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Splunk | Splunk | ≥ 9.4.0 and < 9.4.14≥ 10.0.0 and < 10.0.9≥ 10.2.0 and < 10.2.6≥ 10.4.0 and < 10.4.2 | Vulnerable | NIST National Vulnerability Database |
| Splunk | Splunk Enterprise | ≥ 10.4 and < 10.4.2≥ 10.2 and < 10.2.6≥ 10.0 and < 10.0.9≥ 9.4 and < 9.4.14 | Vulnerable | CVE Program (cve.org) e CISA ADP |
Attack characteristics
The CVSS vector, decoded. It describes the attack, not your exposure to it.
Every base score collected
Sources score independently and may disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Scored by |
|---|---|---|---|---|---|
| 5.7 | CVSS 3.1 | Medium | 2.1 | 3.6 | psirt@cisco.com via NIST National Vulnerability Database |
| 5.7 | CVSS 3.1 | Medium | — | — | cisco via CVE Program (cve.org) e CISA ADP |
| 5.4 | CVSS 3.1 | Medium | 2.3 | 2.7 | nvd@nist.gov via NIST National Vulnerability Database |
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N (score shown at the top: nvd@nist.gov) Weakness MITRE
Weakness class according to MITRE’s CWE catalog.
Detection
Read off the CVSS vector and the weakness class. Starting points, not tested rules.
- Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
- Monitor CSP violation reports and script payloads in reflected parameters.
Timeline
What happened to this CVE, newest first.
- 2026
- Affected products added · splunk/splunk enterprise
- SSVC assessment updated
- Record published
- Fix documented
- CVSS changed · 5.4
- Source status changed · → Analyzed
- Record created in this database
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 1× Official description updated · Oct 15, 2026 – Oct 15, 2026
References
1 on the record
Elsewhere on this site
Related CVEs (same products)
- Critical CVE-2026-76285 Improper Adherence to Coding Standards in Splunk Enterprise 8d
- Critical CVE-2026-76284 Improper Neutralization in Splunk Enterprise 8d
- Medium CVE-2026-76280 Incorrect Permission Assignment for App Key Value Store Collections in Splunk Secure Gateway 8d
- Medium CVE-2026-76281 Improper Access Control in Splunk Enterprise 8d
- Medium CVE-2026-76279 Improper Input Validation of Index Names through the collect Command in Splunk Enterprise 8d
- Medium CVE-2026-76278 Authorization Bypass in SPL2 Module Permissions in Splunk Enterprise 8d
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No FIRST EPSS score.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.
Answered from this record
Text assembled only from the fields above — no additional claims.
What should defenders know first?
CVE-2026-76324 is "Stored Cross-Site Scripting (XSS) in Splunk Web Tours in Splunk Enterprise", rated Medium. It affects Splunk (Splunk); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.4 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.
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