vulnsig-py

Render CVSS vulnerability vectors as expressive SVG glyphs. Each glyph encodes all base metrics visually with shape, color, rings, and texture, so vulnerabilities are recognizable at a glance.

Supports CVSS 4.0, 3.1, and 3.0.

Visit vulnsig.io to interactively explore CVSS glyph configurations and recent or well-known CVE vector glyphs.

Install

pip install vulnsig

Usage

from vulnsig import render_glyph

svg = render_glyph("CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H")

# override the score (e.g. if you already have it)
svg = render_glyph("CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", score=10.0)

# control rendered size in pixels (default 120)
svg = render_glyph("CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", size=64)

render_glyph returns an SVG string ready to embed in HTML or write to a file.

Examples

CVSS 4.0

Glyph	Name	Vector	Score
	Log4Shell	AV:N AC:L AT:N PR:N UI:N VC:H VI:H VA:H SC:H SI:H SA:H	10.0
	EternalBlue	AV:N AC:L AT:N PR:N UI:N VC:H VI:H VA:H SC:N SI:N SA:N	9.3
	Heartbleed	AV:N AC:L AT:N PR:N UI:N VC:H VI:N VA:N SC:L SI:N SA:N	8.7
	Spectre	AV:L AC:H AT:P PR:L UI:N VC:H VI:N VA:N SC:H SI:N SA:N	5.6
	XSS Stored	AV:N AC:L AT:N PR:L UI:P VC:L VI:L VA:N SC:N SI:N SA:N	5.1
	USB Drop	AV:P AC:L AT:N PR:N UI:N VC:H VI:H VA:H SC:N SI:N SA:N	7.3

CVSS 3.x

Glyph	Name	Vector	Score
	Log4Shell	AV:N AC:L PR:N UI:N S:C C:H I:H A:H	10.0
	XSS Reflected	AV:N AC:L PR:N UI:R S:C C:L I:L A:N	6.1

Visual encoding

Each metric maps to a distinct visual channel:

Metric	Channel
Score	Hue — yellow (low) → orange → dark red (high)
AV	Star points — N=8, A=6, L=4, P=3
AC	Star pointiness — L=sharp, H=blunt
AT	Ring segmentation — N=solid, P=cut pattern
PR	Star outline — N=none, L=thin, H=thick
UI	Perimeter — N=spikes, P=bumps, A=clean
VC/VI/VA	Inner ring brightness per sector
SC/SI/SA	Outer ring band (split when any > 0)

Requirements

Python 3.10+

What Is New in VulnSig

1.3.0

Added rendering of Exploit Maturity.

Improved rendering of PR.

1.2.0

Improved glyph rendering over diverse backgrounds.

Extension to the public interface.