What’s Vulnerable › Vulnerabilities

CVE-2026-53777: Perry < 0.5.1159 Path Traversal via ArtifactReady WebSocket

• Severity: high (CVSS 8.1 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: 2026-06-11 · updated 2026-10-26
• Weakness: CWE-22

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.

Affected products

• PerryTS perry: before 0.5.1159 — fixed in 0.5.1159

How to fix

Upgrade to a fixed version: PerryTS perry 0.5.1159. Check the vendor advisory for mitigations.

References

• https://github.com/PerryTS/perry/commit/95e1043df8081f67038bffce847dd9ddb3dae046
• https://github.com/PerryTS/perry/pull/4989
• https://github.com/PerryTS/perry/releases/tag/v0.5.1159
• https://github.com/PerryTS/perry/security/advisories/GHSA-x55v-q459-68ch
• https://www.vulncheck.com/advisories/perry-path-traversal-via-artifactready-websocket
• https://github.com/PerryTS/perry/security/advisories/GHSA-x55v-q459-68ch

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