CVE-2026-72688 — OpenSignLabs opensignserver - Missing Authentication for Critical Function

CVE-2026-72688

OpenSignLabs opensignserver - Missing Authentication for Critical Function PUBLISHED

Description (CNA)

A missing authentication vulnerability in OpenSignLabs opensignserver through 2.37.0 allows an unauthenticated remote attacker to read arbitrary stored documents via the fileupload Parse cloud function. The function mints MASTER_KEY-signed file access tokens for any caller-supplied URL without performing any session check, defeating the only access control protecting stored contract files.

Affected (CNA)

Vendor / product	Versions
OpenSignLabs / opensignserver	affected 0 through 2.37.0

CWE

CWE-306

References

https://github.com/OpenSignLabs/OpenSign

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.