VIR Vulnerability Intelligence Relay

CVE-2026-42796

critical
Published 2026-05-04 · Modified 2026-05-27
CVSS v3
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v2
—
VIR risk
9.8

Description

Arelle before 2.39.10 contains an unauthenticated remote code execution vulnerability in the /rest/configure REST endpoint that accepts a plugins query parameter and forwards it to the plugin manager without authentication or authorization. Attackers can supply a URL to a malicious Python file through the plugins parameter, causing the Arelle webserver to download and execute the attacker-controlled code within the Arelle process with its privileges.

Predictions

Exploit likelihood
97%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: disclosure@vulncheck.com — https://github.com/Arelle/Arelle/releases/tag/2.39.10

vendor Authored 2026-05-27

Vendor advisory: disclosure@vulncheck.com — https://github.com/Arelle/Arelle/pull/2320

Application impact
VendorProductVersionsFixed
workivaarelle{"endExcluding":"2.39.10"}2.39.10

References

CWEs

CWE-306

Verify integrity in audit chain (admin only). AS-IS.