Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-65827— Docmost: Unbounded ZIP decompression (zip-bomb) in page import allows denial of service

Quick assessment

Affected
docmost docmost
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.

Docmost 是一款开源的协作式维基与文档管理软件。在版本 0.21.0 至 0.95.0 之间，任何具有编辑权限的已认证工作空间成员均可通过“页面导入”功能上传归档文件。该功能的 ZIP 解压缩过程未对总解压大小、单个条目大小或条目数量进行限制。解压器会将条目写入服务器的临时目录，并自动解压嵌套的 ZIP 文件。因此，即使外层上传受限于默认的 200 MB 大小限制，实际解压后仍可能膨胀至数 GB。由此引发的磁盘空间耗尽可能导致导入工作进程崩溃，进而影响或导致所有租户所在实例的服务降级或不可用。该问题已在 0.

CVSS 6.5 · Medium EPSS 0.29% · P20

Affected Version Matrix 1

VendorProduct Version RangeStatus
docmost docmost >= 0.21.0, < 0.95.0 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-65827

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Docmost: Unbounded ZIP decompression (zip-bomb) in page import allows denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
Docmost is open-source collaborative wiki and documentation software. From 0.21.0 until 0.95.0, any authenticated workspace member with edit rights to a space can upload an archive to the page-import feature whose ZIP extraction routine does not limit total uncompressed size, per-entry size, or entry count. The extractor writes entries to the server temp directory and automatically extracts one nested ZIP, allowing an outer upload within the default 200 MB limit to expand by multiple GB. The resulting disk exhaustion can crash the import worker and degrade or take down the instance for all tenants. This issue is fixed in version 0.95.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
docmost docmost >= 0.21.0, < 0.95.0 -

II. Public POCs for CVE-2026-65827

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-65827

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-65827 (1)

Vendor Advisories for CVE-2026-65827 (1)

Vendor Pages for CVE-2026-65827 (1)

Same Patch Batch · docmost · 2026-09-24 · 6 CVEs total

CVE-2026-48070 7.1 HIGH Docmost: Avatar URL path traversal in avatar cleanup leads to arbitrary local file deletio
CVE-2026-48072 5.3 MEDIUM Docmost: Public image fileName path traversal leads to unauthorized local file read
CVE-2026-52853 5.2 MEDIUM Docmost: Privilege Escalation - ADMIN Can Invite Users as OWNER
CVE-2026-52850 4.3 MEDIUM Docmost: Broken access control in transclusion lookup API leaks sync-block content across
CVE-2026-48073 4.3 MEDIUM Docmost: Page export can include restricted same-space attachments through forged attachme

IV. Related Vulnerabilities

Same product: docmost
Same vendor: docmost
Same weakness: CWE-400

V. Comments for CVE-2026-65827

No comments yet

Leave a comment