CVE-2026-28427: OpenDeck affected by path traversal allows arbitrary file read

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-03-04 · updated 2026-06-17
Weakness: CWE-22

Description

OpenDeck is Linux software for your Elgato Stream Deck. Prior to 2.8.1, the service listening on port 57118 serves static files for installed plugins but does not properly sanitize path components. By including ../ sequences in the request path, an attacker can traverse outside the intended directory and read any file OpenDeck can access. This vulnerability is fixed in 2.8.1.

Affected products

nekename OpenDeck: before 2.8.1 — fixed in 2.8.1

How to fix

Upgrade to a fixed version: nekename OpenDeck 2.8.1. Check the vendor advisory for mitigations.

References

https://github.com/nekename/OpenDeck/commit/488a52050017e95a72ba448226ac5e19a20dd9ed
https://github.com/nekename/OpenDeck/security/advisories/GHSA-4974-g27q-h5m8

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