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CVE

CVE-2026-42796

Arelle < 2.39.10 Unauthenticated RCE via /rest/configure
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CVE

CVE-2026-42796

Arelle < 2.39.10 Unauthenticated RCE via /rest/configure

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.2
-
4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42796.json, https://nvd.nist.gov/vuln/detail/CVE-2026-42796, https://www.vulncheck.com/advisories/arelle-unauthenticated-rce-via-rest-configure, https://github.com/Arelle/Arelle/pull/2320, https://github.com/Arelle/Arelle/releases/tag/2.39.10

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.02415%
EPSS Percentile
0.82863%
Introduced Version
0
Fix Available
0733db1f789202e3417d2b71dbd02d486da01299

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