CVE-2026-53777

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 69% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
8.1
EG Score
8.1(medium)
EG Risk
52(Track*)
EG Risk 52/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

June 11, 2026

Last Modified

July 14, 2026

Advisory Details (5)

Auto-updated Jun 11, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github, github_commit, github_pr.
github Patch Available🟡 PoC Available

perry publish Arbitrary File Write via Path Traversal in Server-Controlled artifact_name · Advisory · PerryTS/perry · GitHub

https://github.com/PerryTS/perry/security/advisories/GHSA-x55v-q459-68ch
generic

Perry < 0.5.1159 Path Traversal via ArtifactReady WebSocket | Advisories | VulnCheck

https://www.vulncheck.com/advisories/perry-path-traversal-via-artifactready-websocket
github_release Patch Available

v0.5.1159

Patch available: PerryTS/perry v0.5.1159

https://github.com/PerryTS/perry/releases/tag/v0.5.1159
github_pr

fix(publish): sanitize server-controlled artifact path (GHSA-x55v-q459-68ch)

Fix merged in PerryTS/perry PR #4989 on 2026-06-11 — awaiting tagged release

https://github.com/PerryTS/perry/pull/4989
github_commit

commit 95e1043df808 (PerryTS/perry)

Fix landed in PerryTS/perry commit 95e1043df808 — awaiting tagged release

https://github.com/PerryTS/perry/commit/95e1043df8081f67038bffce847dd9ddb3dae046

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 31× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 139 total refreshes for this CVE.

  1. 2026-09-16 05:15 UTCEPSS rescore
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  1. 2026-08-20 08:51 UTCEG score recompute
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Frequently asked(5)

What is CVE-2026-53777?
CVE-2026-53777 is a high vulnerability published on June 11, 2026. 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 artifactname field of ArtifactReady WebSocket messages. Attackers controlling…
When was CVE-2026-53777 disclosed?
CVE-2026-53777 was first published in the National Vulnerability Database on June 11, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53777 actively exploited?
CVE-2026-53777 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 68.6% of all scored CVEs.
What is the CVSS score of CVE-2026-53777?
CVE-2026-53777 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-53777?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53777, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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