CVE-2026-24901: Outline is a service that allows for collaborative documentation

Q: How do I fix CVE-2026-24901?

outline: upgrade to 1.4.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-24901 being exploited?

CVE-2026-24901 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-24901 affect?

CVE-2026-24901 affects outline. Severity is high (CVSS 8.1). 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 o

Q: How urgent is CVE-2026-24901?

Priority 39/100. High severity; Public exploit reference

Routine

HIGH 8.1UPGRADE

CVE-2026-24901 is a high-severity flaw (CVSS 8.1) affecting outline. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-639
Published	2026-03-17
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: getoutline

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-17 16:16 UTCPublished CVE record published
2026-06-17 10:23 UTCUpdated Record last modified

getoutline outline UPGRADE

Affected: < 1.4.0

Fixed in: 1.4.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy outline || rpm -q outline || outline --version

2. UPGRADE to 1.4.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade outline

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade outline

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-24901?

outline: upgrade to 1.4.0. Exact commands for each OS are on this page.

Is CVE-2026-24901 being exploited?

CVE-2026-24901 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-24901 affect?

CVE-2026-24901 affects outline. Severity is high (CVSS 8.1). 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 o

How urgent is CVE-2026-24901?

Priority 39/100. High severity; Public exploit reference

Related CVEs

CVE-2026-41649 HIGH 7.7 UPGRADE Outline is a service that allows for collaborative documentation
CVE-2026-44695 MEDIUM 5.8 UPGRADE Outline is a service that allows for collaborative documentation
CVE-2026-33640 CRITICAL 9.8 UPGRADE Outline is a service that allows for collaborative documentation
CVE-2026-28506 MEDIUM 4.3 UPGRADE Outline is a service that allows for collaborative documentation
CVE-2026-25062 MEDIUM 5.5 UPGRADE Outline is a service that allows for collaborative documentation

References

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