Dashboard / CVE-2026-63441

CVE-2026-63441

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 60/100
Published: 2026-11-06 Modified: 2026-11-12 First seen: 2026-11-06 Status: active

Attack Surface

Network Low Complexity No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: X
AT: Present
VC: None
VI: None
VA: None

Description

2FAuth is a web app to manage Two-Factor Authentication (2FA) accounts and generate their security codes. From 6.1.0 until 8.0.0, App\Services\Traits\ValidatesUrls::isPublicIp() does not recognize the 64:ff9b::/96 and 64:ff9b:1::/48 NAT64 prefixes, so an otpauth URI image parameter can pass an IPv6 literal or DNS64-synthesized address whose embedded IPv4 target is private, link-local, loopback, or cloud metadata. In a deployment with image fetching enabled and a NAT64 translation path to the internal IPv4 target, an account holder can submit the crafted URI directly, or an external attacker can induce a victim to import a crafted URI or migration payload. IconService::buildFromRemoteImage() then issues an HTTP GET to the embedded target, allowing image-shaped responses to be recovered or other endpoints to be probed blindly. This issue is fixed in version 8.0.0.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
Bubka 2FAuth >= 6.1.0, < 8.0.0
Bubka 2FAuth >= 6.1.0, < 8.0.0

References & Advisories (3)

Bug Bounty Relevance

60 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

4.9 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.31%
Raw Score 0.003100
Percentile 24.2%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00310
2026-11-12
0.00310
2026-11-10
0.00310
2026-11-09
0.00310
2026-11-08
0.00310
2026-11-07
0.00310

Intelligence Sources

mitre ref →
nvd ref →

External Links