GHSA-MF33-GV72-W2H5
Vulnerability from github – Published: 2026-05-18 17:50 – Updated: 2026-06-09 10:50
VLAI
Summary
CloakBrowser: Unauthenticated path traversal via fingerprint parameter in cloakserve leads to arbitrary directory deletion
Details
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.
Impact
An attacker with network access to the cloakserve port can delete arbitrary directories accessible to the service user.
Patches
Fixed in v0.3.28.
Mitigations
- Upgrade to v0.3.28 or later
- Restrict network access to the cloakserve port
Severity
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 0.3.27"
},
"package": {
"ecosystem": "PyPI",
"name": "cloakbrowser"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.3.28"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-45727"
],
"database_specific": {
"cwe_ids": [
"CWE-22"
],
"github_reviewed": true,
"github_reviewed_at": "2026-05-18T17:50:21Z",
"nvd_published_at": "2026-06-01T19:16:53Z",
"severity": "HIGH"
},
"details": "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.\n\nAdditionally, `cloakserve` bound to `0.0.0.0` by default, making it network-exposed.\n\n### Impact\n\nAn attacker with network access to the cloakserve port can delete arbitrary directories accessible to the service user.\n\n### Patches\n\nFixed in v0.3.28.\n\n### Mitigations\n\n- Upgrade to v0.3.28 or later\n- Restrict network access to the cloakserve port",
"id": "GHSA-mf33-gv72-w2h5",
"modified": "2026-06-09T10:50:57Z",
"published": "2026-05-18T17:50:21Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/CloakHQ/CloakBrowser/security/advisories/GHSA-mf33-gv72-w2h5"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45727"
},
{
"type": "PACKAGE",
"url": "https://github.com/CloakHQ/CloakBrowser"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "CloakBrowser: Unauthenticated path traversal via fingerprint parameter in cloakserve leads to arbitrary directory deletion"
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…