CVE-2026-27933: Manyfold vulnerable to session hijack via cookie leakage in proxy caches

Severity: medium (CVSS 6.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-02-26 · updated 2026-06-17
Weakness: CWE-613

Description

Manyfold is an open source, self-hosted web application for managing a collection of 3d models, particularly focused on 3d printing. Versions prior to 0.133.0 are vulnerable to session hijack via cookie leakage in proxy caches. Version 0.133.0 fixes the issue.

Affected products

manyfold3d manyfold: before 0.133.0 — fixed in 0.133.0

How to fix

Upgrade to a fixed version: manyfold3d manyfold 0.133.0. Check the vendor advisory for mitigations.

References

https://github.com/manyfold3d/manyfold/releases/tag/v0.133.0
https://github.com/manyfold3d/manyfold/security/advisories/GHSA-g949-hmvj-2r76

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