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TI-2026-32586 Aliases CVE-2026-44695

Outline: Slack OAuth state can link a victim Outline account to an attacker Slack identity

Priority MEDIUM 62CWE-352Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Tampering
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-352.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00125 2nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed outline (outline): 1.7.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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 1.7.11.7.1Patch availableCNA
  • outline Vendoroutline Affected before 1.7.1 Fixed in 1.7.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:getoutline:outline:*:*:*:*:*:*:*:*before 1.7.1Vulnerableoutline
  • cpe:2.3:a:getoutline:outline:*:*:*:*:*:*:*:* Versions before 1.7.1 Vulnerable ·outline

Remediation

  • Fix · CNA outline (outline) Fixed in 1.7.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-44695

References

Exploit 1

  • TI-2026-26021 Outline has a rate limit bypass that allows brute force of email login OTP CVSS 4.0CRITICAL 9.1
  • 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-2026-30168 Outline has IDOR in document share creation that allows unauthorized access to private documents across workspaces CVSS 3.1HIGH 7.7
  • TI-2024-27038 Stored Cross-site Scripting (XSS) vulnerability in Outline editor CVSS 3.1HIGH 7.3
  • TI-2024-25168 An issue in Outline <= v0.76.1 allows attackers to redirect a victim user to a malicious… CVSS 3.1MEDIUM 6.1
See all 14 →

Sources

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