CVE-2026-53777 json
Perry < 0.5.1159 Path Traversal via ArtifactReady WebSocket
published 2026-06-11 4 mo ago modified 2026-11-08 22 h ago also EUVD-2026-36253
- cvss
- 8.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- PerryTS perry 0.5.1159
- github.com/PerryTS/perry@95e1043 commit
- github.com/PerryTS/perry#4989 pull request
- github.com/PerryTS/perry/releases/tag/v0.5.1159 release
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 4 mo ago
Exploit prediction
0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/PerryTS/perry/security/advisories/GHSA-x55v-q459-68ch referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.6 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N |
| CNA | 4.0 | 8.6 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- PerryTS perry
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/PerryTS/perry/pull/4989
issue-tracking, patch
-
github.com
/PerryTS/perry/commit/95e1043df8081f67038bffce847dd9ddb3dae046
patch
-
github.com
/PerryTS/perry/security/advisories/GHSA-x55v-q459-68ch
vendor-advisory, exploit
-
github.com
/PerryTS/perry/releases/tag/v0.5.1159
release-notes
-
vulncheck.com
/advisories/perry-path-traversal-via-artifactready-websocket
third-party-advisory
Sources
- CVE List CVE-2026-53777
- NVD CVE-2026-53777
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.