CVE-2026-45727

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 62% 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
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

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

CloakBrowser is a tool to bypass bot detection tests. Prior to version 0.3.28, the cloakserve CDP multiplexer uses the user-supplied fingerprint query parameter directly as a filesystem path component when creating Chrome profile directories. An unauthenticated attacker who can reach the cloakserve port can supply a crafted fingerprint value containing path traversal sequences to resolve user_data_dir outside the configured data_dir. When Chrome fails to start or the process is cleaned up, shutil.rmtree() deletes the traversed path, resulting in arbitrary directory deletion. Additionally, cloakserve bound to 0.0.0.0 by default, making it network-exposed. This issue has been patched in version 0.3.28.

CVSS v3
8.8
EG Score
8.8(medium)
EPSS
37.9%
KEV
Not listed

Published

May 18, 2026

Last Modified

June 2, 2026

Advisory Details (1)

Auto-updated Jun 2, 2026
Patch available. Sources: github.
github Patch Available

Unauthenticated path traversal via fingerprint parameter in cloakserve leads to arbitrary directory deletion · Advisory · CloakHQ/CloakBrowser · GitHub

Affected: v0.3.28.

https://github.com/CloakHQ/CloakBrowser/security/advisories/GHSA-mf33-gv72-w2h5

Vendor Advisories for CVE-2026-45727(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
cloakbrowser0.1.0 ... 0.3.9 (43 versions)0.3.28—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 48× 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.

  1. 2026-07-15 16:57 UTCEPSS rescore
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  20. 2026-06-28 08:40 UTCEG score recompute
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  1. 2026-06-26 19:55 UTCEG score recompute
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  4. 2026-06-25 13:49 UTCEPSS rescore
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  22. 2026-06-16 17:52 UTCEPSS rescore
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  25. 2026-06-15 17:49 UTCEPSS rescore
  26. 2026-06-15 01:36 UTCEG score recompute
  27. 2026-06-14 14:17 UTCEG score recompute
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  37. 2026-06-11 14:00 UTCEPSS rescore
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  39. 2026-06-10 22:18 UTCEPSS rescore
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  43. 2026-06-10 06:02 UTCEG score recompute
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  47. 2026-06-08 14:17 UTCEPSS rescore
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  67. 2026-06-04 02:56 UTCEG score recompute▲ 8.80
  68. 2026-06-02 20:13 UTCEPSS rescore
  69. 2026-05-24 06:16 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-45727?
CVE-2026-45727 is a high vulnerability published on May 18, 2026. CloakBrowser is a tool to bypass bot detection tests. Prior to version 0.3.28, the cloakserve CDP multiplexer uses the user-supplied fingerprint query parameter directly as a filesystem path component when creating Chrome profile directories. An unauthenticated attacker who can reach the cloakserve…
When was CVE-2026-45727 disclosed?
CVE-2026-45727 was first published in the National Vulnerability Database on May 18, 2026, with the most recent update on June 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45727 actively exploited?
CVE-2026-45727 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 37.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45727?
CVE-2026-45727 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-45727?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45727, 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.

Dependency Blast Radius

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