CVE-2026-48070: Docmost: Avatar URL path traversal in avatar cleanup leads to arbitrary local file deletion

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-24 · updated 2026-10-05
Weakness: CWE-22

Description

Docmost is open-source collaborative wiki and documentation software. Prior to 0.80.1, authenticated users can store attacker-controlled avatarUrl values that are later reused by avatar cleanup without confinement to the intended directory on local-storage deployments. A low-privileged user can cause deletion of arbitrary local files or directories reachable by the Docmost service account. This issue is fixed in version 0.80.1.

Affected products

docmost: before 0.80.1

References

https://github.com/docmost/docmost/commit/a573acedd0317f3472cb0f8b95f6aa15315312e5
https://github.com/docmost/docmost/releases/tag/v0.80.1
https://github.com/docmost/docmost/security/advisories/GHSA-95f8-h5hf-8248

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