CVE-2026-41649Public exploitNetwork attack vectorHinoki check available

Authenticated cross-workspace document disclosure via collection-only authorization

Published Apr 28, 2026 · Updated Apr 28, 2026

IDOR in Outline 0.86.0 through 1.6.9 allows remote authenticated users to read private documents across workspaces via shares.create. In server/routes/api/shares/shares.ts, collectionId takes precedence over documentId during authorization, then Share.findOrCreateWithCtx stores the unchecked documentId in a public share. Remote authenticated users need only an accessible collection while sharing is enabled by default, after which documents.info returns the full referenced document.

CVSS severity7.7
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

IDOR in Outline 0.86.0 through 1.6.9 allows remote authenticated users to read private documents across workspaces via shares.create. In server/routes/api/shares/shares.ts, collectionId takes precedence over documentId during authorization, then Share.findOrCreateWithCtx stores the unchecked documentId in a public share. Remote authenticated users need only an accessible collection while sharing is enabled by default, after which documents.info returns the full referenced document.

The record

CVE
CVE-2026-41649
Published
Apr 28, 2026
Updated
Apr 28, 2026
Vendor
Outline
Product
Outline
Classifications
CWE-639, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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=>= 0.86.0, < 1.7.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Outline · Outlineversion=>= 0.86.0, < 1.7.0

Published CVSS scores

7.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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.

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 exploitPublished

Weakness, pattern, technique

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

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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