How severe is CVE-2026-24901?

CVE-2026-24901 has a CVSS 3.x base score of 8.1, 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 high, and availability none.

Is CVE-2026-24901 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-24901?

CVE-2026-24901 affects Getoutline Outline. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-24901?

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-2026-24901 have an EU (EUVD) identifier?

Yes. CVE-2026-24901 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12582.

When was CVE-2026-24901 published?

CVE-2026-24901 was published on 2026-03-17 and last updated on 2026-06-17.

CVE-2026-24901

CVE-2026-24901 is a high-severity vulnerability in Getoutline Outline with a CVSS 3.x base score of 8.1. 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 8.1)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12582
Weakness: CWE-639
Affected product: Getoutline Outline
Published: 2026-03-17
Last modified: 2026-06-17

Description

Outline is a service that allows for collaborative documentation. Prior to 1.4.0, an Insecure Direct Object Reference (IDOR) vulnerability in the document restoration logic allows any team member to unauthorizedly restore, view, and seize ownership of deleted drafts belonging to other users, including administrators. By bypassing ownership validation during the restore process, an attacker can access sensitive private information and effectively lock the original owner out of their own content. Version 1.4.0 fixes the issue.

Frequently asked questions

What is CVE-2026-24901?: Outline is a service that allows for collaborative documentation. Prior to 1.4.0, an Insecure Direct Object Reference (IDOR) vulnerability in the document restoration logic allows any team member to unauthorizedly restore, view, and seize ownership of deleted drafts belonging to other users, including administrators. By bypassing ownership validation during the restore process, an attacker can access sensitive private information and effectively lock the original owner out of their own content. Version 1.4.0 fixes the issue.
How severe is CVE-2026-24901?: CVE-2026-24901 has a CVSS 3.x base score of 8.1, 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 high, and availability none.
Is CVE-2026-24901 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-24901?: CVE-2026-24901 affects Getoutline Outline. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-24901?: 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-2026-24901 have an EU (EUVD) identifier?: Yes. CVE-2026-24901 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12582.
When was CVE-2026-24901 published?: CVE-2026-24901 was published on 2026-03-17 and last updated on 2026-06-17.

References

https://github.com/outline/outline/security/advisories/GHSA-gmr5-43f5-79f5

Affected products (1)

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

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