CVE-2026-72548Network attack vectorHinoki check available

Unauthenticated tenant disclosure via unchecked gettenant access

Published Aug 11, 2026 · Updated Aug 11, 2026

Information disclosure in OpenSign through 2.37.0 allows unauthenticated remote attackers to retrieve tenant records through gettenant. The Parse cloud function accepts a caller-controlled contactId and returns the complete tenant object without authenticating the caller or authorizing access to the requested organization. Network access to the exposed function is sufficient to enumerate organizations and disclose their tenant configuration data.

CVSS severity7.5
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Information disclosure in OpenSign through 2.37.0 allows unauthenticated remote attackers to retrieve tenant records through gettenant. The Parse cloud function accepts a caller-controlled contactId and returns the complete tenant object without authenticating the caller or authorizing access to the requested organization. Network access to the exposed function is sufficient to enumerate organizations and disclose their tenant configuration data.

The record

CVE
CVE-2026-72548
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
OpenSignLabs
Product
OpenSign
Classifications
CWE-200, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2.37.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenSignLabs · OpenSignversion=0 <=2.37.0

Published CVSS scores

7.5TuranSecCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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