CVE WatchAug 11, 2026

CVE-2026-72549

An information disclosure vulnerability in OpenSignLabs OpenSign through 2.37.0 allows unauthenticated remote attackers to map any email add

CVSS

5.3

Medium

EPSS

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KEV

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Exploit Today

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0-100

Published: Aug 11, 2026 · Last modified: Aug 11, 2026 · CWE-200

EPSS · 30d

Not enough EPSS history yet.

Technical description

An information disclosure vulnerability in OpenSignLabs OpenSign through 2.37.0 allows unauthenticated remote attackers to map any email address or username to its internal user objectId via the getUserId Parse cloud function. The function performs no authentication before resolving and returning the internal identifier. An attacker can use this to enumerate user accounts and target subsequent attacks.

Official references

github.comhttps://github.com/OpenSignLabs/OpenSign

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