CVE intelligence and bounded remediation

CVE-2023-26961 — Alteryx Server 2022.1.1.42590 does not employ file type verification for uploaded files

Medium CVSS 4.8

Alteryx Server 2022.1.1.42590 does not employ file type verification for uploaded files. This vulnerability allows attackers to upload arbitrary files (e.g., JavaScript content for stored XSS) via the type field in a JSON document within a PUT /gallery/api/media request.

Severity
Medium
CVSS
4.8 (3.1)
Published
2023-08-08
CISA KEV
Not currently listed
Ecosystem
javascript/npm
Weaknesses
CWE-79

Affected products

  • alteryx / alteryx_server / 2022.1.1.42590

Matched remediation archetype

Cross-site scripting and unsafe browser output

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Check exposure

  • Trace reflected, stored, and DOM-derived untrusted values into HTML, attributes, URLs, styles, scripts, and client-side template sinks.
  • Identify affected origins, authenticated user roles, sensitive browser capabilities, and where content is shared across tenants.
  • Review framework escaping, rich-text sanitization, legacy templates, and client-side rendering paths.

Remediate safely

  • Use context-aware framework output encoding and safe DOM APIs; keep untrusted data out of executable contexts.
  • Sanitize intentionally supported markup with a maintained allowlist policy and validate URLs and attributes separately.
  • Update affected rendering components and add tests for every output context using inert sentinel markup.

Authoritative sources

Complete CVE record and remediation plan

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