Docmost: Page export can include restricted same-space attachments through forged attachmentId

Description

Docmost is open-source collaborative wiki and documentation software. From 0.70.0 until 0.80.1, a low-privileged authenticated user who can edit an exportable page can embed a forged attachmentId that belongs to a restricted page in the same space. Exporting the attacker-controlled page with includeAttachments=true causes the page export flow to read the restricted attachment from storage and include it in the returned ZIP archive even though direct file download denies access. This issue is fixed in version 0.80.1.

Scores

EPSS (exploitation in 30 days)

0.19% · top 91% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.

Weakness

• CWE-639: Authorization Bypass Through User-Controlled Key (opens in a new tab)All about CWE-639 and its CVEs

Affected products

• docmost · docmost

  • affected >= 0.70.0, < 0.80.1

References (3)

• https://github.com/docmost/docmost/security/advisories/GHSA-rxm9-xp9h-4c84 (opens in a new tab)x_refsource_CONFIRM
• https://github.com/docmost/docmost/commit/a573acedd0317f3472cb0f8b95f6aa15315312e5 (opens in a new tab)x_refsource_MISC
• https://github.com/docmost/docmost/releases/tag/v0.80.1 (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-48073](https://trackcve.app/badge/CVE-2026-48073.svg)](https://trackcve.app/cve/CVE-2026-48073)

Record last updated 24 Sept 2026, 19:23 UTC.