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New RCE Vulnerability Discovered in REDCap (CVE-2026-90817)

First seen 24 Sep 2026, 09:55 UTC • •57.8

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ThreatCluster •September 24, 2026 at 09:56 UTC

•CVE-2026-90817 allows RCE in REDCap versions 13.3.0 and above.
•Exploit requires a valid public survey hash for full chain execution.
•No complete PoC is publicly available yet; only a checker tool has been released.

A remote code execution vulnerability (CVE-2026-90817) has been identified in REDCap versions 13.3.0 and above, allowing attackers to exploit public survey hashes to access unintended controllers. The vulnerability arises from unsafe file-path handling through the `__passthru` routing mechanism. Securifera, the discoverer, has not yet released a complete proof-of-concept (PoC), but a Python 3 checker and exploit hook have been made available for research purposes. The vulnerability was published on September 20, 2026, and the first public PoC was released on September 21, 2026. Affected users are urged to upgrade to fixed versions 16.0.49 LTS, 17.3.10 LTS, or 17.4.4 Standard+. The exploit requires a valid public survey hash for full functionality, and the tool includes features for single and mass checks against vulnerable instances.

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Timeline

2026-09-20

CVE-2026-90817 published

A remote code execution vulnerability in REDCap was publicly disclosed, affecting versions 13.3.0 and above.

2026-09-21

First public PoC released

Securifera released the first public proof-of-concept for CVE-2026-90817, enabling testing for the vulnerability.

2026-09-24

Exploit tool released

A Python 3 checker and configurable exploit hook for CVE-2026-90817 was published, allowing researchers to probe affected systems.

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Threat Graph

5 entities, 5 inferred relationships (STIX 2.1).

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Technique (1)

Zero-day Exploit

Vulnerability (1)

CVE-2026-90817

Weakness (1)

CWE-94 - Code Injection

Affected Platform (2)

REDCap
Windows

Relationships

CVE-2026-90817 targets REDCap
CVE-2026-90817 targets Windows
Zero-day Exploit targets REDCap
Zero-day Exploit targets Windows
CVE-2026-90817 related to CWE-94 - Code Injection

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