CVE-2026-20202 (GCVE-0-2026-20202)
Vulnerability from cvelistv5 – Published: 2026-04-15 15:17 – Updated: 2026-04-16 03:55
VLAI
EPSS
VEX
Title
Improper Input Validation during User Account Creation in Splunk Enterprise
Summary
In Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.10, and 9.3.11, and Splunk Cloud Platform versions below 10.4.2603.0, 10.3.2512.6, 10.2.2510.10, 10.1.2507.20, 10.0.2503.13, and 9.3.2411.127, a user who holds a role that contains the high-privilege capability `edit_user`could create a specially crafted username that includes a null byte or a non-UTF-8 percent-encoded byte due to improper input validation.<br><br>This could lead to inconsistent conversion of usernames into a proper format for storage and account management inconsistencies, such as being unable to edit or delete affected users.
Severity
6.6 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-15 00:00 UTC
CWE
- CWE-176 - The software does not properly handle when an input contains Unicode encoding.
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Splunk | Splunk Enterprise |
Affected:
10.2 , < 10.2.2
(custom)
Affected: 10.0 , < 10.0.5 (custom) Affected: 9.4 , < 9.4.10 (custom) Affected: 9.3 , < 9.3.11 (custom) |
guessed | |
| Splunk | Splunk Cloud Platform |
Affected:
10.4.2603 , < Not Affected
(custom)
Affected: 10.3.2512 , < 10.3.2512.6 (custom) Affected: 10.2.2510 , < 10.2.2510.10 (custom) Affected: 10.1.2507 , < 10.1.2507.20 (custom) Affected: 10.0.2503 , < 10.0.2503.13 (custom) Affected: 9.3.2411 , < 9.3.2411.127 (custom) |
guessed |
Date Public
2026-04-15 00:00
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Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.