Vulnerability · Published Jun 11, 2026 · Assigned by VulnCheck

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

High 8.1

In plain English

A high-severity path traversal in perry from PerryTS. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.5%top 59.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
PerryTS	perry	0 – before 0.5.1159

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

References

https://github.com/PerryTS/perry/releases/tag/v0.5.1159 release-notes
https://github.com/PerryTS/perry/security/advisories/GHSA-x55v-q459-68ch vendor-advisory
https://github.com/PerryTS/perry/pull/4989 issue-tracking
https://github.com/PerryTS/perry/commit/95e1043df8081f67038bffce847dd9ddb3dae046 patch
https://www.vulncheck.com/advisories/perry-path-traversal-via-artifactready-websocket third-party-advisory