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    CVE-2026-72688

    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.

    Published:Aug 10, 2026
    Last Modified:Aug 11, 2026
    EPS:Aug 10, 2026
    EPSS Score:0.00501
    CVSS Score:7.5

    Affected Products

    Vendor
    Opensignlabs
    Product
    Opensignserver

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-72549 (CVSS 5.3) — An information disclosure vulnerability in OpenSignLabs OpenSign through 2.37.0 allows unauthenticated remote …
    CVE-2026-72548 (CVSS 7.5) — An information disclosure vulnerability in OpenSignLabs OpenSign through 2.37.0 allows unauthenticated remote …
    CVE-2026-72544 (CVSS 7.5) — An integrity verification vulnerability in OpenSignLabs OpenSign through 2.37.0 allows unauthenticated remote …
    CVE-2026-72543 (CVSS 7.5) — An insecure direct object reference vulnerability in OpenSignLabs OpenSign through 2.37.0 allows unauthenticat…
    CVE-2026-72692 (CVSS 7.5) — A missing authorization vulnerability in OpenSignLabs opensignserver through 2.37.0 allows an unauthenticated …
    CVE-2026-72691 (CVSS 7.5) — An authentication bypass vulnerability in OpenSignLabs opensignserver through 2.37.0 allows an unauthenticated…
    CVE-2026-72689 (CVSS 7.5) — A broken object-level authorization vulnerability in OpenSignLabs opensignserver through 2.37.0 allows an unau…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High