CVE-2026-53777

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.

CVSS 4.0

8.6CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

8.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 31% of CVEs (scores of 2026-10-25)

CWE

CWE-22

Published

2026-06-11

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

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

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