CVE-2026-76203

CSS sanitizer bypass in Pentestify report themes allows forced outbound requests

Published Aug 19, 2026 CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Description
Incorrect Behavior Order: Validate Before Canonicalize in the report theme CSS sanitizer
in maalfer Pentestify 1.2.0 through 2.3.2 allows an authenticated user to force outbound
HTTP requests from other users' browsers, disclosing their IP address and User-Agent, via
CSS hex escapes that reconstruct the url() function and evade the sanitizer blocklist

Remediation

Vendor Solution

Tagged releases v2.0.0, v2.2.0, v2.3.0 and v2.3.2 shipped vulnerable. v1.1.1 is not affected (no custom_css field). The fix is not tagged and does not bump the version constant, so the upper bound cannot be stated as a version until a release is cut. It´s recommended to install from the repository.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Incorrect Behavior Order: Validate Before Canonicalize in the report theme CSS sanitizer in maalfer Pentestify 1.2.0 through 2.3.2 allows an authenticated user to force outbound HTTP requests from other users' browsers, disclosing their IP address and User-Agent, via CSS hex escapes that reconstruct the url() function and evade the sanitizer blocklist
Title CSS sanitizer bypass in Pentestify report themes allows forced outbound requests
First Time appeared Maalfer
Maalfer pentestify
Weaknesses CWE-180
CPEs cpe:2.3:a:maalfer:pentestify:*:*:*:*:*:*:*:*
Vendors & Products Maalfer
Maalfer pentestify
References
Metrics cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Secur0
Published
Updated
Aug 21, 2026, 4:18 PM
Reserved
Aug 19, 2026, 11:15 AM
Status
Deferred
Published
Aug 19, 2026, 3:18 PM
Modified
Sep 1, 2026, 8:52 PM