CVE-2026-21759Network attack vector

API-surface disclosure via public Swagger documentation

Published Aug 24, 2026 · Updated Aug 24, 2026

Information exposure in HCL Hive 1.0 allows remote attackers to view Swagger API documentation without authentication. The deployed web interface serves its Swagger documentation to unauthenticated requests instead of enforcing access control, exposing API endpoints and request structures. Network reachability and interaction with the documentation endpoint are required; HCL reports no credentials or PII in the exposed material, so the direct impact is API-surface disclosure.

CVSS severity4.3
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information exposure in HCL Hive 1.0 allows remote attackers to view Swagger API documentation without authentication. The deployed web interface serves its Swagger documentation to unauthenticated requests instead of enforcing access control, exposing API endpoints and request structures. Network reachability and interaction with the documentation endpoint are required; HCL reports no credentials or PII in the exposed material, so the direct impact is API-surface disclosure.

The record

CVE
CVE-2026-21759
Published
Aug 24, 2026
Updated
Aug 24, 2026
Vendor
HCLSoftware
Product
HCL Hive
Classifications
CWE-215, T1595
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 24, 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=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HCLSoftware · HCL Hiveversion=1.0

Published CVSS scores

4.3HCLSoftwareCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/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-215Insertion of Sensitive Information Into Debugging Code
T1595Active Scanning

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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