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TI-2026-46906 Aliases CVE-2026-65827

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

Priority LOW 29CWE-400Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00295 22nd percentileScored 2026-11-07
Fix Fixed docmost (docmost): 0.95.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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
docmostdocmost0.21.0 to before 0.95.00.95.0Patch availableCNA
  • docmost Vendordocmost Affected 0.21.0 to before 0.95.0 Fixed in 0.95.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:docmost:docmost:*:*:*:*:*:*:*:*——docmost
  • cpe:2.3:a:docmost:docmost:*:*:*:*:*:*:*:* Versions — — ·docmost

Remediation

  • Fix · CNA docmost (docmost) Fixed in 0.95.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-65827

References

Other 3

  • TI-2026-17859 Docmost affected by an Arbitrary File Write via Zip Import Feature (ZipSlip) CVSS 3.1CRITICAL 9.8
  • TI-2026-19373 Docmost Affected by Stored XSS in Public Share Page CVSS 3.1HIGH 7.3
  • TI-2025-35043 Cross Site Scripting vulnerability in docmost v.0.21.0 and before allows an attacker to execute arbitrary code CVSS 3.1MEDIUM 6.1
  • TI-2026-35511 Docmost: Avatar URL path traversal in avatar cleanup leads to arbitrary local file deletion CVSS 3.1HIGH 7.1
  • TI-2026-35513 Docmost: Public image fileName path traversal leads to unauthorized local file read CVSS 3.1MEDIUM 5.3
  • TI-2026-19029 Docmost is vulnerable to stored Cross-Site Scripting (XSS) through Mermaid rendering CVSS 4.0MEDIUM 6.3
See all 14 →

Sources

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