CVE-2026-76277
MEDIUM 4.1In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15, a user that holds a role with the edit_user capability could create a native Splunk username that ends with a period. The vulnerability is possible because username validation does not reject a trailing period before the username is used for a user directory. This can cause distinct native Splunk usernames to share per-user configuration data, and user-management operations can affect the wrong account or fail. For more information see Set up native Splunk authentication (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.4/use-the-native-splunk-platform-authentication-scheme/set-up-native-splunk-authentication) and Define roles on the Splunk platform with capabilities (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.4/manage-splunk-platform-users-and-roles/define-roles-on-the-splunk-platform-with-capabilities) in the Splunk documentation.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.2%chance of exploitation in 30 days · 16th percentile
Impact if exploited
4.1CVSS 3.1 · MEDIUM
- ConfidentialityLow
- IntegrityLow
- AvailabilityLow
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ⚠Privileges: Requires an admin / high-privilege account
- ✓User interaction: No user interaction needed
- ⚠Complexity: Needs a race window or specific setup
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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Data snapshot:
Weakness (CWE)
- CWE-20: The product does not validate or incorrectly validates input that can affect the control flow or data flow of a program.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L
References and research data (JSON)
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Splunk | Splunk | ≥ 9.4.0 and < 9.4.15 |
| Splunk | Splunk | ≥ 10.0.0 and < 10.0.10 |
| Splunk | Splunk | ≥ 10.2.0 and < 10.2.7 |
| Splunk | Splunk | ≥ 10.4.0 and < 10.4.3 |
All CVSS metrics
- MEDIUM 4.1 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L - MEDIUM 4.1 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L
References
Advisories
- https://advisory.splunk.com/advisories/SVD-2026-1001 CVE record · cisco · Updated 2026-10-07T20:46:35.907Z
NVD · CVE-2026-76277 · Updated 2026-10-14T12:03:45.950 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-94629 EUVD · EUVD-2026-94629