CVE-2026-120449— Outline before 1.12.0 Improper Access Control via Public Document Shares

Quick assessment

Affected

Outline Outline

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

1.12.0 之前的 Outline 版本存在不当访问控制漏洞，允许未认证用户读取未发布的文档，原因是共享加载器忽略了未发布状态。持有现有共享链接的攻击者可以通过查询 shares.info、documents.info 或 /s/ 共享路由来读取已撤回的内容，而 shares.revoke 接口会返回 404 错误并阻止撤销操作。

CVSS 5.3 · Medium Updated Nov 03, 2026

Possible ATT&CK Techniques 2 AI

T1190 · Exploit Public-Facing Application T1078 · Valid Accounts

Affected Version Matrix 1

Vendor	Product	Version Range	Status
Outline	Outline	`< 1.12.0`	affected

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Vulnerability Information

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Vulnerability Title

Outline before 1.12.0 Improper Access Control via Public Document Shares

Source: CVE Program / CVE List V5

Vulnerability Description

Outline before 1.12.0 contains an improper access control vulnerability that allows unauthenticated users to read unpublished documents because the share loader ignores unpublished status. Attackers holding an existing share link can query shares.info, documents.info, or the /s/ share routes to read withdrawn content, while shares.revoke returns 404 and blocks revocation.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

在过期或释放后对资源进行操作

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Outline	Outline	0 ~ 1.12.0	-

II. Public POCs for CVE-2026-120449

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-120449

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Other References for CVE-2026-120449 (5)

https://github.com/outline/outline/blob/v1.11.0/server/commands/shareLoader.ts#L50-L77 technical-description
https://github.com/outline/outline/commit/d015a32459b5f5c5a8ef67aeb81742eeab430c52 patch
https://github.com/outline/outline/releases/tag/v1.12.0 release-notes
https://github.com/outline/outline/security/advisories/GHSA-rq53-m97j-f2pg vendor-advisory
https://www.vulncheck.com/advisories/outline-before-1.12.0-improper-access-control-via-public-document-shares third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-120449

IV. Related Vulnerabilities

Same product: Outline

Same vendor: Outline

Same weakness: CWE-672