CVE-2026-55583Public exploitNetwork attack vector

Cross-workspace data access via unscoped turn lookups

Published Jun 24, 2026 · Updated Jun 24, 2026

IDOR in Twenty before 2.9.0 allows remote authenticated users to read other workspaces' AI chat histories and create evaluations. The AgentTurnResolver and grader service query agent turns by agentId or id without constraining workspaceId, then return messages or insert an evaluation. Access requires the AI settings flag and a victim UUID obtained from browser history or a screenshot; workspace owners receive the flag by default.

CVSS severity7.6
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IDOR in Twenty before 2.9.0 allows remote authenticated users to read other workspaces' AI chat histories and create evaluations. The AgentTurnResolver and grader service query agent turns by agentId or id without constraining workspaceId, then return messages or insert an evaluation. Access requires the AI settings flag and a victim UUID obtained from browser history or a screenshot; workspace owners receive the flag by default.

The record

CVE
CVE-2026-55583
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
Twenty
Product
Twenty
Classifications
CWE-639, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 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=< 2.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Twenty · Twentyversion=< 2.9.0

Published CVSS scores

7.6GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1213Data from Information Repositories

Public exploit references

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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