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Splunk Enterprise CVE-2026-76323

| EUVDEUVD-2026-63130 HIGH
Improper Input Validation (CWE-20)
2026-08-19 cisco GHSA-v8p8-5fmf-v762
7.3
CVSS 3.1 · NVD
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Recon
    Attacker authenticates to Splunk with low-privilege account
  2. Delivery
    Craft Job Details URL embedding injected SPL in search identifier
  3. Exploit
    Deliver crafted URL to authenticated higher-privilege victim via phishing
  4. Install
    Victim opens link in active Splunk browser session
  5. C2
    Job Details dashboard processes unsanitized identifier into SPL query
  6. Execute
    Injected risky commands execute under victim's permissions
  7. Impact
    Attacker achieves unauthorized data access and integrity impact

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Input validation, allowlisting
Exploitation Conditions

The attacker must hold a valid Splunk Enterprise account explicitly lacking both the 'admin' and 'power' roles - these restricted users are the attacker class the vulnerability targets, as higher-privileged users already have access to risky SPL commands through legitimate means. A second authenticated Splunk user (the victim) must be socially engineered into opening a crafted Job Details dashboard URL while actively logged into Splunk; the attack cannot proceed without this victim interaction. The injected SPL is bounded by the victim's permissions - it does not grant the attacker capabilities beyond what the victim's role already permits, so the impact scales with victim privilege level. The Splunk web interface must be network-accessible to the attacker for link delivery context, and the Job Details dashboard feature must be available in the deployment. Exploitation is not possible at will by the attacker alone due to the mandatory phishing prerequisite.

Impact

The CVSS 3.1 score of 7.3 (AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N) accurately captures the key risk dynamics: the attack is network-reachable and low-complexity, but requires the attacker to hold a valid low-privilege account (PR:L) and to successfully phish an authenticated victim into clicking a crafted link (UI:R). The mandatory social engineering step is a meaningful practical barrier, reducing this from a direct exploitation scenario to one requiring attacker persistence and operational effort. No EPSS score was provided in the available intelligence data, making probabilistic exploitation forecasting unavailable. This CVE is not listed in the CISA KEV catalog, and no public proof-of-concept code has been identified, both consistent with no observed mass exploitation at time of analysis. The primary realistic risk involves an insider threat or a compromised low-privilege account targeting a colleague with broader Splunk access. The C:H/I:H impact ratings are justified given that Splunk environments commonly ingest sensitive security telemetry, log data, and operational metrics - making the data exposure consequence material despite the phishing dependency. This is a genuine priority for organizations with multi-tenant or role-stratified Splunk deployments, but not an emergency for those with tightly controlled user bases.

Exploit ScenarioDerived

An attacker with a low-privilege Splunk account constructs a Job Details dashboard URL in which the search identifier parameter contains injected SPL risky commands, then delivers this link to a colleague with broader Splunk data access via email or an internal messaging platform. When the victim opens the link while authenticated to Splunk, the injected SPL bypasses the attacker's own role-based command restrictions and executes under the victim's permissions, enabling the attacker to read sensitive indexes, extract search results, or alter search-related configurations the victim's role permits. No public proof-of-concept has been identified, meaning an attacker would need independent knowledge of the injection point and SPL syntax to operationalize this attack.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv2 – Aug 20, 2026

SPL injection in Splunk Enterprise's Job Details dashboard enables a low-privileged authenticated attacker to bypass Search Processing Language risky-command safeguards by embedding a malicious search identifier in a crafted dashboard URL and phishing an authenticated victim into opening it. The injected SPL executes under the victim's permissions, potentially exposing all data accessible to that user and compromising search integrity within those bounds. No active exploitation is confirmed and no public exploit code has been identified; a vendor patch is available across all four affected release trains per advisory SVD-2026-0801.

Earlier versions of this analysis (1)
v1 Aug 19, 2026 - 22:35 CVSS 6.4

SPL injection via the Job Details dashboard in Splunk Enterprise (9.4.x below 9.4.14, 10.0.x below 10.0.9, 10.2.x below 10.2.6, 10.4.x below 10.4.2) allows a low-privileged authenticated user to bypass safeguards for risky Search Processing Language commands by embedding a malicious search identifier in a crafted dashboard URL. The injected SPL executes under the permissions of whatever authenticated user opens the crafted link, meaning a successful phishing step can expose all data indexed within the victim's access scope and affect data integrity. No public exploit or CISA KEV listing has been identified at time of analysis; however, the high C:H/I:H impact and network-accessible delivery make this a meaningful risk in environments where untrusted Splunk users coexist with privileged ones.

RemediationAI

Upgrade to Splunk Enterprise 10.4.2, 10.2.6, 10.0.9, or 9.4.14 per the applicable release train, as documented in vendor advisory SVD-2026-0801 at https://advisory.splunk.com/advisories/SVD-2026-0801. Where immediate patching is not feasible, restrict access to the Job Details dashboard for users without the 'admin' or 'power' roles via Splunk's role-based access control (RBAC) configuration, which eliminates the injection surface for the attacker class described; note this may impact legitimate job monitoring workflows for restricted users. Additionally, network-level controls limiting who can reach the Splunk web interface reduce the phishing surface area, and security awareness training targeting link-clicking behavior in internal tooling contexts can further reduce victim conversion rates. Disabling the Job Details dashboard for untrusted roles would be the most effective compensating control if RBAC granularity is insufficient.

Affected VersionsENISA

Splunk Enterprise 10.0 <10.0.9
Splunk Enterprise 10.2 <10.2.6
Splunk Enterprise 9.4 <9.4.14
Splunk Enterprise 10.4 <10.4.2

Affected Packages

euvd splunk_enterprise fix: 9.4.14, 10.0.9, 10.2.6, 10.4.2

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Splunk Enterprise's Search Processing Language (SPL) enforces safeguards that block users without the 'admin' or 'power' roles from executing designated risky commands. The Job Details dashboard - which surfaces job metadata and allows search interaction - fails to neutralize a caller-supplied search identifier before embedding it into downstream SPL queries (CWE-20: Improper Input Validation). This allows an attacker-controlled string to escape its intended data context and be interpreted as SPL syntax, circumventing the role-based command restrictions. The affected codebase spans CPE cpe:2.3:a:splunk:splunk_enterprise:*:*:*:*:*:*:*:* across versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14. The flaw is structurally an injection vulnerability where user-supplied input is trusted as a safe identifier rather than treated as untrusted data requiring sanitization before inclusion in a query language.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (cisco) PRIMARY MEDIUM
NVD 7.3 HIGH
AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
vuln.today AI 7.3 HIGH

PR:L for required attacker account; UI:R for mandatory victim phishing; C:H/I:H for full data and integrity exposure within victim's permissions; A:N as no availability impact is described.

3.1 AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (cisco).

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

4
Severity Changed
Aug 20, 2026 - 13:52 NVD
MEDIUM HIGH
CVSS changed
Aug 20, 2026 - 13:52 NVD
6.4 (MEDIUM) 7.3 (HIGH)
Patch available
Aug 19, 2026 - 22:04 EUVD
CVE Published
Aug 19, 2026 - 21:34 nvd
MEDIUM 6.4

DescriptionNVD

In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, a user who does not hold the "admin" or "power" Splunk roles could bypass Search Processing Language (SPL) safeguards for risky commands through the Job Details dashboard. The injected SPL could run using the permissions of an authenticated user who opens a crafted Job Details dashboard link. This could allow access to all relevant data and affect system integrity within those permissions. The vulnerability is possible because the Job Details dashboard does not correctly neutralize a caller-supplied search identifier before placing it into SPL searches. The vulnerability requires the attacker to phish the user by tricking them into opening the crafted link. The user who does not hold the "admin" or "power" Splunk roles should not be able to exploit the vulnerability at will. For more information see About jobs and job management (https://help.splunk.com/en/splunk-enterprise/search/search-manual/10.4/manage-jobs/about-jobs-and-job-management) in the Splunk documentation.

Executive ViewAI

Why It Matters

SPL injection vulnerability in Splunk Enterprise's Job Details dashboard allows authenticated users to bypass data access controls through phishing-based attacks, potentially exposing sensitive organizational data. While exploitation requires user interaction and authenticated access, successful attacks compromise search integrity and data boundaries across Splunk instances. Immediate patching is required to eliminate this attack vector.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.2%
Top 85% exploitable
Prevalence
High
widely deployed enterprise SIEM and log analytics platform across large organizations
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact
High
Technical Impact
Total

Priority Score

36
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +36
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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