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CVE-2026-105695— Penpot: Missing authorization in chunked-upload assembly lets another authenticated user consume a victim's upload session

Quick assessment

Affected
penpot penpot
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.

Penpot 是一个开源的设计与原型制作平台。在版本 2.18.0 之前， 接口仅通过会话 ID（session ID）获取上传会话，而 接口则正确地将查找范围限定在经过身份验证的用户配置文件内。攻击者若获取到其他用户正在使用且已完成的上传会话 UUID，便可以将该受害者的文件块组装到攻击者自己的文件、团队字体或项目导入中，从而导致上传内容泄露，并删除受害者尚待处理的上传会话。此问题已在版本 2.18.0 中得到修复。

CVSS 5.9 · Medium
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I. Basic Information for CVE-2026-105695

Vulnerability Information
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Vulnerability Title
Penpot: Missing authorization in chunked-upload assembly lets another authenticated user consume a victim's upload session
Source: CVE Program / CVE List V5
Vulnerability Description
Penpot is an open-source design and prototyping platform. Prior to 2.18.0, assemble-chunks retrieves an upload session using only its session ID, while upload-chunk correctly scopes the lookup to the authenticated profile. An authenticated user who obtains another user's live, completed upload-session UUID can assemble the victim's chunks into the attacker's own file, team font, or project import, disclosing the uploaded bytes and deleting the victim's pending session. This issue is fixed in version 2.18.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
penpot penpot < 2.18.0 -

II. Public POCs for CVE-2026-105695

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III. Intelligence Information for CVE-2026-105695

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Other References for CVE-2026-105695 (4)

Same Patch Batch · penpot · 2026-10-05 · 12 CVEs total

CVE-2026-105691 9.9 CRITICAL Penpot: Authenticated OS Command Injection in Penpot SVG Exporter via Legacy fill-color
CVE-2026-105688 6.7 MEDIUM Penpot: Team admin can escalate to owner via team invitation (missing owner-role guard on
CVE-2026-105696 6.5 MEDIUM Penpot: Share-link page-scope escalation: a share-link holder reads pages outside the link
CVE-2026-105689 6.0 MEDIUM Penpot: SSRF guard bypass via IPv6 transition addresses (NAT64/6to4/Teredo) in webhook del
CVE-2026-105690 5.9 MEDIUM Penpot: Server-side session not invalidated on logout; stale auth-token cookie remains val
CVE-2026-105694 5.4 MEDIUM Penpot: Stored XSS via Unsanitised SVG Uploads
CVE-2026-105692 5.4 MEDIUM Penpot: IDOR in Share-Link Deletion Allows Any File Editor to Delete Share-Links They Did
CVE-2026-105693 5.3 MEDIUM Penpot: Anonymous share-link token disclosure & page-scope bypass via get-view-only-bundle
CVE-2026-105686 5.3 MEDIUM Penpot: Repeated chunk index causes temporary-storage amplification
CVE-2026-105687 4.9 MEDIUM Penpot: A team admin (non-owner) can remove the team owner via ::delete-team-member — miss
CVE-2026-105684 4.3 MEDIUM Penpot: Share-link page-scope escape — comment RPCs leak comment content, author identity,

IV. Related Vulnerabilities

Same product: penpot
Same vendor: penpot
Same weakness: CWE-862

V. Comments for CVE-2026-105695

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