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

Medium · CVSS 6.5CVE-2026-65827

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

Answer in brief

CVE-2026-65827 records a Medium severity (CVSS 6.5) vulnerability in Docmost: Unbounded ZIP decompression (zip-bomb) in page import allows denial of service. The current sources do not mark it as known exploited. The current feed maps docmost/docmost (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 24, 2026Updated Sep 24, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 24, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps docmost/docmost (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
docmost/docmostgeneric	>=0.21.0 <0.95.0	0.95.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for docmost/docmost.
Review the reported fix. Update docmost/docmost to 0.95.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.