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Outline before 1.12.0 Improper Access Control via Public Document Shares

Affects Outline before 1.12.0, where public share links can keep showing a document after its owner unpublished it. Fixed in 1.12.0.

Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.

6.9MediumCNA
Exploited
Proof of concept public, per CISA
Fix
Fixed in 1.12.0
Who is exposed
Not reported

Do first: Upgrade to a fixed version: 1.12.0.

Published
Last modified
Published
Not listed in CISA KEV
32/100 · provisional
Unclear
Fix
Fixed in 1.12.0
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: poc
  • Automatable: yes
  • Technical impact: partial

Summary

Outline before 1.12.0 contains an improper access control vulnerability that allows unauthenticated users to read unpublished documents because the share loader ignores unpublished status. Attackers holding an existing share link can query shares.info, documents.info, or the /s/ share routes to read withdrawn content, while shares.revoke returns 404 and blocks revocation.

What to do

  • Upgrade to a fixed version: 1.12.0.

Timeline

  1. CVE published
  2. First seen by cve.now
  3. CISA SSVC assessment

    Exploitation: poc · Automatable: yes · Technical impact: partial

  4. Record last updated

Affected versions

  • Outline Outline

    fixed in 1.12.0

Evidence 5

  1. Advisory
  2. Patch
  3. Repository
  4. Repository
  5. Link

Corrections

None so far.

Something wrong on this page? Report an error. Every fix is listed here.

FAQ

Questions about CVE-2026-120449

What does this mean?

Anyone holding a public share link can read the full content of a document without signing in, even after the owner has unpublished it. Owners and workspace administrators cannot revoke that share while the document remains unpublished.Source: github.com

Am I affected, and how do I check?

Outline versions before 1.12.0 are affected. To check, look up the Outline version that is installed and compare it with 1.12.0.Source: github.com

What should I do about it?

Upgrade Outline to version 1.12.0 or later, which contains the fix.Source: github.com

Is it being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. CISA's SSVC assessment notes a proof of concept exists. No public exploit code is tracked.Source: cve.now feed data