How severe is CVE-2026-41649?

CVE-2026-41649 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-41649 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-41649?

CVE-2026-41649 affects Getoutline Outline. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-41649?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-41649 have an EU (EUVD) identifier?

Yes. CVE-2026-41649 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26144.

When was CVE-2026-41649 published?

CVE-2026-41649 was published on 2026-04-28 and last updated on 2026-06-17.

CVE-2026-41649

CVE-2026-41649 is a high-severity vulnerability in Getoutline Outline with a CVSS 3.x base score of 7.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-639.

Key facts

Severity: High (CVSS 3.x base score 7.7)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26144
Weakness: CWE-639
Affected product: Getoutline Outline
Published: 2026-04-28
Last modified: 2026-06-17

Description

Outline is a service that allows for collaborative documentation. The `shares.create` API endpoint starting in version 0.86.0 and prior to version 1.7.0 has an insecure direct object reference.. When both `collectionId` and `documentId` are provided in the request, the authorization logic only checks access to the collection, completely ignoring the document. This allows an authenticated attacker to generate a valid public share link for any document on the platform, including documents belonging to other workspaces. The full document contents can then be retrieved via the `documents.info` endpoint. Version 1.7.0 contains a patch.

Frequently asked questions

What is CVE-2026-41649?: Outline is a service that allows for collaborative documentation. The `shares.create` API endpoint starting in version 0.86.0 and prior to version 1.7.0 has an insecure direct object reference.. When both `collectionId` and `documentId` are provided in the request, the authorization logic only checks access to the collection, completely ignoring the document. This allows an authenticated attacker to generate a valid public share link for any document on the platform, including documents belonging to other workspaces. The full document contents can then be retrieved via the `documents.info` endpoint. Version 1.7.0 contains a patch.
How severe is CVE-2026-41649?: CVE-2026-41649 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-41649 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-41649?: CVE-2026-41649 affects Getoutline Outline. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-41649?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-41649 have an EU (EUVD) identifier?: Yes. CVE-2026-41649 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26144.
When was CVE-2026-41649 published?: CVE-2026-41649 was published on 2026-04-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:getoutline:outline:*:*:*:*:*:*:*:*

More vulnerabilities in Getoutline Outline

CVE-2026-33640 — Critical (CVSS 9.8): Outline is a service that allows for collaborative documentation. Outline implements an Email OTP login flow for users…
CVE-2024-37829 — High (CVSS 8.8): An issue in Outline <= v0.76.1 allows attackers to execute a session hijacking attack via user interaction with a…
CVE-2026-24901 — High (CVSS 8.1): Outline is a service that allows for collaborative documentation. Prior to 1.4.0, an Insecure Direct Object Reference…
CVE-2023-54331 — High (CVSS 7.8): Outline 1.6.0 contains an unquoted service path vulnerability that allows local attackers to potentially execute…
CVE-2025-64487 — High (CVSS 7.6): Outline is a service that allows for collaborative documentation. Prior to 1.1.0, a privilege escalation vulnerability…
CVE-2024-40626 — High (CVSS 7.3): Outline is an open source, collaborative document editor. A type confusion issue was found in ProseMirror’s rendering…

All CVEs affecting Getoutline Outline →

Other CWE-639 (Authorization Bypass Through User-Controlled Key (IDOR)) vulnerabilities

CVE-2025-40805 — Critical (CVSS 10.0): Affected devices do not properly enforce user authentication on specific API endpoints. This could facilitate an…
CVE-2024-45032 — Critical (CVSS 10.0): A vulnerability has been identified in Industrial Edge Management Pro (All versions < V1.9.5), Industrial Edge…
CVE-2026-34037 — Critical (CVSS 9.9): Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to…
CVE-2026-52782 — Critical (CVSS 9.9): OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, there is an IDOR through…
CVE-2026-45552 — Critical (CVSS 9.9): Roxy-WI is a web interface for managing Haproxy, Nginx, Apache and Keepalived servers. In versions 8.2.6.4 and prior,…
CVE-2026-29200 — Critical (CVSS 9.9): A critical IDOR vulnerability has been discovered in Comet Backup affecting all versions from 20.11.0 to 26.1.1 and…

Browse all CWE-639 (Authorization Bypass Through User-Controlled Key (IDOR)) vulnerabilities →