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TI-2026-83841 Aliases CVE-2026-120449GHSA-4q4r-qmm8-wr2p

Outline exposes unpublished documents through public share links

Priority HIGH 70CWE-672Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Outline before 1.12.0 has an improper access control flaw (CWE-672) where the share loader ignores unpublished status. An unauthenticated attacker who holds an existing share link can read unpublished documents, including content that was withdrawn.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

Outline before 1.12.0 contains an improper access control vulnerability that allows unauthenticated users to read unpublished documents because the share loader ignores unpublished status. Attackers holding an existing share link can query shares.info, documents.info, or the /s/ share routes to read withdrawn content, while shares.revoke returns 404 and blocks revocation.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00443 38th percentileScored 2026-11-07
Fix Fixed Outline (Outline): 1.12.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
outlineOutlinebefore 1.12.01.12.0Patch availableCNA
  • Outline Vendoroutline Affected before 1.12.0 Fixed in 1.12.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:getoutline:outline:*:*:*:*:*:*:*:*——outline
  • cpe:2.3:a:getoutline:outline:*:*:*:*:*:*:*:* Versions — — ·outline

Remediation

Upgrade Outline to version 1.12.0 or later, which fixes this flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

  • Fix · CNA Outline (Outline) Fixed in 1.12.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Outline 1.12.0

    2 records Highest priority Priority HIGH 1 HIGH, 1 LOW

    Other records, highest priority first

    • TI-2026-83856 Incorrect authorization in Outline lets members publish into private collectionsPriority LOW 24
    Show all 2 records →

Timeline

  1. 2026-11-02 Threatist record created from CVE-2026-120449
  2. 2026-11-02 CISA SSVC decision points changed
  3. 2026-11-02 Priority changed: MEDIUM → HIGH
  4. 2026-11-02 Alias added: GHSA-4q4r-qmm8-wr2p

References

Patch 1

Advisory 1

Other 2

  • TI-2026-26021 Outline has a rate limit bypass that allows brute force of email login OTP CVSS 4.0CRITICAL 9.1
  • TI-2026-31952 Outline: Zip Extraction Path Escape via PATH_MAX Truncation in Collection Import CVSS 3.1HIGH 8.7
  • TI-2026-20086 Outline's IDOR allows unauthorized viewing and seizing of private deleted drafts CVSS 3.1HIGH 8.8
  • TI-2024-25167 An issue in Outline <= v0.76.1 allows attackers to execute a session hijacking attack via… CVSS 3.1HIGH 8.8
  • TI-2020-19165 Outline Service 1.3.3 - 'Outline Service ' Unquoted Service Path CVSS 4.0HIGH 8.5
  • TI-2026-31950 Outline: OAuth Scope Validation Logic Error Allows Privilege Escalation to Wildcard API Access CVSS 3.1HIGH 8.2
See all 24 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences