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TI-2026-83856 Aliases CVE-2026-120489GHSA-vf3p-f5rx-9848

Incorrect authorization in Outline lets members publish into private collections

Priority LOW 24CWE-863Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-863.

Summary

Outline before 1.12.0 has an incorrect authorization flaw (CWE-863) in authorizeDocumentPublish() that lets authenticated members publish documents into private collections without write access. An attacker with low privileges can detach a child document over the network, then move it into a private collection to inject phishing content.

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

Description from the CNA

Outline before 1.12.0 contains an incorrect authorization vulnerability in authorizeDocumentPublish() that allows authenticated members to publish documents into private collections without write access. Attackers can detach a child document via documents.unpublish, retaining parentDocumentId, then call documents.update with a private collection UUID to inject phishing content.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00245 15th percentileScored 2026-11-07
Fix Fixed Outline (Outline): 1.12.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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 issue.

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-2026-83841 Outline exposes unpublished documents through public share linksPriority HIGH 70
    Show all 2 records →

Timeline

  1. 2026-11-02 Threatist record created from CVE-2026-120489
  2. 2026-11-02 Alias added: GHSA-vf3p-f5rx-9848
  3. 2026-11-02 CISA SSVC decision points changed

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-2026-83841 Outline exposes unpublished documents through public share links CVSS 4.0MEDIUM 6.9
See all 24 →

Sources

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