OpenSignLabs OpenSign - Insufficient Verification of Data Authenticity (CVE-2026-72544) | HOL Guard CVE

High · CVSS 7.5CVE-2026-72544

OpenSignLabs OpenSign - Insufficient Verification of Data Authenticity

Answer in brief

CVE-2026-72544 records a High severity (CVSS 7.5) vulnerability in OpenSignLabs OpenSign - Insufficient Verification of Data Authenticity. The current sources do not mark it as known exploited. The current feed maps OpenSignLabs/OpenSign (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 11, 2026Updated Sep 3, 2026Source checked Sep 25, 2026First seen by HOL Aug 11, 2026Material review Sep 3, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps OpenSignLabs/OpenSign (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
OpenSignLabs/OpenSigngeneric	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for OpenSignLabs/OpenSign.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 11, 2026

Sources and claim methodology

GitHub security advisorygithub.com

Upstream source description

An integrity verification vulnerability in OpenSignLabs OpenSign through 2.37.0 allows unauthenticated remote attackers to forge document audit-trail entries via the triggerevent Parse cloud function. The function accepts viewer identity and IP address as caller-supplied parameters without authentication, allowing fabrication of arbitrary audit log entries. An attacker can tamper with the legal audit trail of any signed document, undermining non-repudiation.

Quoted source text, attributed separately from HOL analysis.