CVE-2026-55210— Joplin: SAML SSO account takeover via email-based account linking (missing is_external check in ssoLogin)
一分钟漏洞结论
影响对象
laurent22 joplin
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.7.2, Joplin Server's UserModel.ssoLogin() returns an existing account matched by an IdP-asserted email without checking the account's is_extern
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一、 漏洞 CVE-2026-55210 基础信息
漏洞信息
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
Joplin: SAML SSO account takeover via email-based account linking (missing is_external check in ssoLogin)
来源: CVE Program / CVE List V5
Vulnerability Description
Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.7.2, Joplin Server's UserModel.ssoLogin() returns an existing account matched by an IdP-asserted email without checking the account's is_external flag. In deployments using mixed local and SAML authentication, an attacker whose IdP session can assert a local user's email can pass POST /api/saml, receive a session for that local account, and access or modify the victim's notes, files, and settings without knowing the local password. This issue is fixed in version 3.7.2.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-55210 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-55210 补丁与修复 (2)
CVE-2026-55210 其他参考 (1)
同批安全公告 · laurent22 · 2026-09-21 · 共 11 条
| CVE-2026-46649 | 9.1 CRITICAL | Joplin: SSO Auth Code Login Missing Rate Limiting — 9-Digit Numeric Code Brute-Forceable v |
| CVE-2026-55105 | 7.7 HIGH | Joplin: Fountain embeds allow arbitrary script execution in published notes and the note v |
| CVE-2026-59814 | 7.6 HIGH | Joplin: Stored XSS via inline-served note attachment on published shares |
| CVE-2026-49450 | 7.1 HIGH | Joplin desktop Windows auto-updater accepts signed installer from any publisher because ap |
| CVE-2026-49453 | 7.0 HIGH | Joplin: Path traversal in resource sync — silent arbitrary file write outside the resource |
| CVE-2026-55179 | 6.5 MEDIUM | Joplin: Logic error in Joplin Server allows a signed-in user to read any note from its int |
| CVE-2026-46650 | 4.4 MEDIUM | Joplin: Stored XSS in public share viewer via javascript: URL bypass in isAcceptedUrl |
| CVE-2026-59816 | 4.3 MEDIUM | Joplin: Path traversal in transcribe proxy endpoint via URL-encoded slash |
| CVE-2026-59815 | 4.3 MEDIUM | Joplin: Pending share recipients can write items into shared folders before accepting invi |
| CVE-2026-49449 | 2.5 LOW | Joplin: KaTeX `trust:true` enables URL-allowlist bypass leading to NTLMv2 credential theft |
IV. Related Vulnerabilities
Same product: joplin
-
CVE-2026-46650
Joplin: Stored XSS in public share viewer via javascript: UR -
CVE-2026-59815
Joplin: Pending share recipients can write items into shared -
CVE-2026-59814
Joplin: Stored XSS via inline-served note attachment on publ -
CVE-2026-55105
Joplin: Fountain embeds allow arbitrary script execution in -
CVE-2026-46649
Joplin: SSO Auth Code Login Missing Rate Limiting — 9-Digit
Same vendor: laurent22
-
CVE-2026-46650
Joplin: Stored XSS in public share viewer via javascript: UR -
CVE-2026-59815
Joplin: Pending share recipients can write items into shared -
CVE-2026-59814
Joplin: Stored XSS via inline-served note attachment on publ -
CVE-2026-55105
Joplin: Fountain embeds allow arbitrary script execution in -
CVE-2026-46649
Joplin: SSO Auth Code Login Missing Rate Limiting — 9-Digit
V. Comments for CVE-2026-55210
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