CVE-2026-56772Network attack vector

Authenticated cross-user disclosure via unchecked user identifier

Published Jun 25, 2026 · Updated Jun 25, 2026

Broken access control in NewsBlur before 14.5.0 allows remote authenticated users to read other users' private social interactions. The load_interactions view passes a GET /social/interactions user_id to MInteraction.user without matching it to request.user. Exploitation requires a valid account and another user's numeric identifier, and exposes follows, replies, and other social activity returned by the endpoint.

CVSS severity5.3
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken access control in NewsBlur before 14.5.0 allows remote authenticated users to read other users' private social interactions. The load_interactions view passes a GET /social/interactions user_id to MInteraction.user without matching it to request.user. Exploitation requires a valid account and another user's numeric identifier, and exposes follows, replies, and other social activity returned by the endpoint.

The record

CVE
CVE-2026-56772
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
Samuel Clay
Product
NewsBlur
Classifications
CWE-639, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 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 <14.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Samuel Clay · NewsBlurversion=0 <14.5.0

Published CVSS scores

5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
4.3VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1190Exploit Public-Facing Application

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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