CVE-2026-53777 Perry < 0.5.1159 Path Traversal via ArtifactReady WebSocket
A malicious build server can exploit path traversal in Perry to overwrite sensitive files or expose local data via unsanitized WebSocket message fields.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-53777?
CVE-2026-53777 is a high-severity path traversal vulnerability in PerryTS perry, published on 11 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Perry before 0.5.1159 contains a path traversal vulnerability that allows a malicious build server to write arbitrary content to any location writable by the running process by supplying unsanitized path components in the artifact_name field of ArtifactReady WebSocket messages. Attackers controlling the server URL can deliver traversal payloads through the artifact_name or download_path fields, causing the client to overwrite sensitive files or expose arbitrary local files to an attacker-accessible location.
Weakness: CWE-22
Which versions are affected by CVE-2026-53777?
How do I fix CVE-2026-53777?
No fix has been published for CVE-2026-53777 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-53777 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53777 exists.
Sources
Also known as GHSA-x55v-q459-68ch.