PT-2026-59093 · Pypi · Cloakbrowser

Published 2026-07-13 · Updated 2026-07-13

OSV

CVSS v4.0

8.8

High

Base vector

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

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

Fix

Related Identifiers

PYSEC-2026-2420

Affected Products

Cloakbrowser

References · 6

• https://osv.dev/vulnerability/PYSEC-2026-2420 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45727 · Security Note
• https://github.com/CloakHQ/CloakBrowser · Note
• https://github.com/CloakHQ/CloakBrowser/security/advisories/GHSA-mf33-gv72-w2h5 · Note
• https://github.com/advisories/GHSA-mf33-gv72-w2h5 · Note
• https://pypi.org/project/cloakbrowser · Note