CSRF in Getoutline Outline
CVE-2026-44695
Outline is a service that allows for collaborative documentation. Prior to 1.7.1, the Slack integration callback for GET /auth/slack.post accepts an unsigned, session-independent OAuth state value. A third party who can obtain a Slack OAuth code for the same Outline Slack client can make a logged-in Outline user complete the callback and link that user's Outline account to the attacker's Slack team_id and user_id. The linked Slack identity can then use the Slack /outline search command as the victim Outline user. This vulnerability is fixed in 1.7.1.
Vulnerability class: CSRF (Cross-Site Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (3.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000
Affected products
- Getoutline Outline
- Outline — versions < 1.7.1
Weakness classification (CWE)
References
- github.com/outline/outline/security/advisories/GHSA-mjgw-5j7q-gv8v (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-44695?
- CVE-2026-44695 is a medium-severity vulnerability in Getoutline Outline, classified under Cross-Site Request Forgery (CSRF). CVSS score: 5.8/10. Published 2026-05-11.
- How severe is CVE-2026-44695?
- Medium severity. CVSS v3 base score is 5.8 out of 10.