CVE-2026-41649: Outline is a service that allows for collaborative documentation

Routine

HIGH 7.7UPGRADE

CVE-2026-41649 is a high-severity flaw (CVSS 7.7) 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. 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 docu

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.7 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-639
Published	2026-04-28
Last modified	2026-07-24

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

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-28 22:16 UTCPublished CVE record published
2026-07-24 21:10 UTCUpdated Record last modified

getoutline outline UPGRADE

Affected: >= 0.86.0 and < 1.7.0

Fixed in: 1.7.0

Safe to downgrade to: a release before 0.86.0

1. Check installed version

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

2. UPGRADE to 1.7.0 (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.

3. If no update is available yet, DOWNGRADE to a release before 0.86.0 (Debian / Ubuntu)

apt-cache madison outline sudo apt install outline=<VERSION_BEFORE_0.86.0> sudo apt-mark hold outline

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list outline sudo dnf downgrade outline-<VERSION_BEFORE_0.86.0> sudo dnf versionlock add outline

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-41649?

outline: upgrade to 1.7.0. Exact commands for each OS are on this page.

Is CVE-2026-41649 being exploited?

CVE-2026-41649 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-2026-41649 affect?

CVE-2026-41649 affects outline. Severity is high (CVSS 7.7). 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

How urgent is CVE-2026-41649?

Priority 37/100. High severity; Public exploit reference

Related CVEs

CVE-2026-44695 MEDIUM 5.8 UPGRADE Outline is a service that allows for collaborative documentation

References

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