Technical Research Report • OWASP Benchmark v1.2

Cyfendo Agentic Scanning on the OWASP Benchmark

By Cyfendo Autonomous Security Research Team • Published August 2026 • 2,740 Test Cases Evaluated • 12 min read
0.84
Youden’s Index (J)
97.3%
Sensitivity (Recall)
13.36%
False Positive Rate
8 / 11
100% Detection in CWEs
Table of Contents (11 Sections)

Abstract

Static Application Security Testing (SAST) has long suffered from high false-positive rates and developer alert fatigue. This paper evaluates Cyfendo Alpha, an agentic LLM vulnerability scanner that combines semantic context reasoning with automated Proof-of-Concept (PoC) exploit verification. Evaluated against all 2,740 test cases of the OWASP Benchmark (v1.2), Cyfendo Alpha achieves a Youden’s Index of 0.84 (97.3% Sensitivity, 13.36% False Positive Rate)—demonstrating how autonomous AppSec can deliver high-precision security analysis and review-ready patches.

Executive Summary #

Modern software engineering requires security tooling that operates at the speed of continuous deployment without sacrificing accuracy. Traditional commercial SAST tools struggle on standardized benchmarks, often yielding high false-positive rates that create severe alert fatigue and necessitate time-consuming manual triage.

The Cyfendo Alpha Agentic Scanning Framework represents a departure from static syntax and pattern matching. By orchestrating specialized LLM agents through a pipeline of taint-guided reasoning and adversarial review, Cyfendo Alpha understands complex code intent and custom sanitization logic that baffles traditional analyzers.

Evaluated across the entire OWASP Benchmark v1.2 suite (2,740 test cases), Cyfendo Alpha achieved 97.3% Sensitivity (catching 1,377 of 1,415 true vulnerabilities) and an 86.6% Specificity rate, resulting in a Youden’s Index of 0.84 and an F1-score of 92.76%. This high diagnostic fidelity enables engineering teams to deploy automated security gates in CI/CD pipelines where findings are trusted to block high-risk regressions without human bottlenecking.

Architecture & Core Technologies #

Cyfendo Alpha operates through a five-stage agentic pipeline designed to deliver comprehensive vulnerability recall while aggressively suppressing false alarms:

STAGE 01

Semantic Context Parsing

Ingests the target codebase to construct a semantic representation of data sources, transformation layers, and sinks, moving beyond rigid abstract syntax trees to understand overarching program intent.

STAGE 02

Taint-Guided LLM Reasoning

Performs virtual data-flow analysis by tracking how untrusted input propagates across functions and custom sanitization routines, uncovering non-obvious logic vulnerabilities.

STAGE 03

Adversarial LLM Review

Subjects candidate findings to an adversarial reviewer agent that challenges reachability, identifies framework-level protections, and filters out non-exploitable theoretical findings.

STAGE 04

Deterministic Structural Validation

Cross-references model reasoning with syntax tree parsing and symbol verification to ensure cited source paths, symbols, and parameters strictly exist in the codebase, enforcing structural validity.

STAGE 05

Dynamic PoC & Reachability Validation

Synthesizes unit-level Proof-of-Concept exploit test cases and executes them in an isolated sandbox for standalone testable sinks. Confirmed exploitable vulnerabilities are prioritized with highest diagnostic confidence, while complex architectural findings maintain full taint reachability graphs.

OWASP Benchmark Overview & Methodology #

The OWASP Benchmark is an open-source evaluation suite designed to assess the accuracy, speed, and coverage of automated software vulnerability scanners.

Test Suite Composition

Version 1.2 consists of 2,740 total test cases across 11 vulnerability categories:

  • True Vulnerabilities (1,415 cases): Test cases containing actual, exploitable vulnerabilities across data-flow sinks.
  • Safe Controls & Decoys (1,325 cases): Code paths containing effective validation, encoding, or framework defenses where vulnerability alerts constitute false positives.

Evaluation Formulae

Performance is quantified using standard diagnostic classification metrics:

  • True Positive Rate (Sensitivity / TPR): TPR = TP / (TP + FN) — measures vulnerability discovery coverage.
  • True Negative Rate (Specificity / TNR): TNR = TN / (TN + FP) — measures precision on safe code.
  • False Positive Rate (FPR): FPR = FP / (TN + FP) = 1 - Specificity.
  • Youden’s Index (J): J = Sensitivity + Specificity - 1 — summarizes overall diagnostic power, where 1.0 represents perfect classification and 0.0 represents random guessing.

Benchmark Analysis & Diagnostic Performance #

The OWASP Benchmark v1.2 provides an objective, standardized testbed for evaluating automated security scanning accuracy. Static application security testing has historically faced an acute trade-off between sensitivity (catching true vulnerabilities) and specificity (resisting false alarms on safe negative controls).

Cyfendo's evaluation was conducted across the entire 2,740 test-case suite under uniform execution conditions. By coupling multi-stage semantic parsing, taint reachability analysis, adversarial review, and dynamic sandbox verification where applicable, Cyfendo Alpha achieves balanced high performance across both dimensions:

Cyfendo Alpha Measured Benchmark Results (OWASP Benchmark v1.2) 2,740 Test Cases
Diagnostic accuracy benchmark results for Cyfendo Alpha on the OWASP Benchmark v1.2 suite.
Evaluation Metric Measured Value Diagnostic Significance
Youden’s Index (J) 0.84 Composite diagnostic power (Sensitivity + Specificity - 1) on a scale from -1.0 to +1.0.
Sensitivity (Recall / TPR) 97.30% Successfully identified 1,377 out of 1,415 true vulnerabilities (2.7% miss rate).
Finding Precision (PPV) 88.61% 1,377 true positives out of 1,554 total flagged findings.
Specificity (TNR) 86.60% Correctly recognized 1,148 of 1,325 safe control test cases without false alarms.
False Positive Rate (FPR) 13.36% 177 false positives across 1,325 safe negative controls.
F1-Score 92.76% Harmonic mean of sensitivity and precision across the full suite.

Performance Summary (OWASP) #

Evaluation results for Cyfendo Alpha across all 2,740 test cases (1,415 vulnerable cases and 1,325 safe controls):

Cyfendo Alpha Empirical Confusion Matrix & Metrics OWASP Benchmark v1.2 Full Suite
Detailed breakdown of total evaluated test cases, confusion matrix, sensitivity, specificity, precision, F1-score, and Youden index for Cyfendo Alpha.
Metric Score / Count Definition & Context
Total Test Cases 2,740 / 2,740 100.0% coverage (1,415 true vulns, 1,325 safe controls)
True Positives (TP) 1,377 Correctly identified vulnerabilities
False Positives (FP) 177 Safe test cases incorrectly flagged
True Negatives (TN) 1,148 Correctly recognized safe controls
False Negatives (FN) 38 Missed vulnerabilities (2.7% miss rate)
Sensitivity (Recall / TPR) 97.30% TP / (TP + FN)
Specificity (TNR) 86.60% TN / (TN + FP)
False Positive Rate (FPR) 13.36% FP / (TN + FP)
Precision (PPV) 88.61% TP / (TP + FP)
F1-Score 92.76% Harmonic mean of Precision and Sensitivity
Youden’s Index (J) 0.84 Overall diagnostic capability (Sensitivity + Specificity - 1)

Category Breakdown #

Performance breakdown across all 11 vulnerability categories evaluated in OWASP Benchmark v1.2:

Performance by CWE Vulnerability Class 11 Test Categories
Performance breakdown of Cyfendo Alpha across all 11 OWASP Benchmark test categories showing test counts, sensitivity, specificity, and Youden index.
Category Total Vulns Safe TP FP TN FN Sensitivity Specificity Youden J
Weak Randomness 493 218 275 217 10 265 1 99.5% 96.4% +0.959
XPath Injection 35 15 20 15 1 19 0 100.0% 95.0% +0.950
Path Traversal 268 133 135 133 10 125 0 100.0% 92.6% +0.926
Secure Cookie Flag 67 36 31 36 3 28 0 100.0% 90.3% +0.903
SQL Injection 504 272 232 272 27 205 0 100.0% 88.4% +0.884
Cross-Site Scripting (XSS) 455 246 209 246 25 184 0 100.0% 88.0% +0.880
Trust Boundary 126 83 43 83 6 37 0 100.0% 86.0% +0.860
LDAP Injection 59 27 32 27 5 27 0 100.0% 84.4% +0.844
Command Injection 251 126 125 114 15 110 12 90.5% 88.0% +0.785
Weak Cryptography 246 130 116 130 48 68 0 100.0% 58.6% +0.586
Weak Hash 236 129 107 104 27 80 25 80.6% 74.8% +0.554
TOTAL 2,740 1,415 1,325 1,377 177 1,148 38 97.3% 86.6% +0.84

Key Observations & Strengths #

  • 100% Recall Across 8 of 11 Tested Benchmark Categories: Cyfendo Alpha achieved complete vulnerability recall on the evaluated test cases for SQL Injection, Cross-Site Scripting (XSS), Path Traversal, Trust Boundary Violations, LDAP Injection, XPath Injection, Secure Cookie Flags, and Weak Cryptography.
  • Low 2.7% Miss Rate: Across 1,415 real vulnerabilities, the scanner missed only 38 test cases, with false negatives concentrated narrowly in Weak Hash (25) and Command Injection (12).
  • Controlled False Positive Rate (13.36%): On safe negative controls, Cyfendo Alpha maintained 86.6% Specificity, correctly recognizing 1,148 out of 1,325 benign test cases without false alarms.
  • Strong Overall Discriminative Power (Youden Index = 0.84): Demonstrates high diagnostic discriminative power across the 2,740 test cases, achieving 97.30% sensitivity and 86.60% specificity under standardized benchmark conditions.

Discussion & Enterprise Impact #

Addressing Developer Alert Fatigue

The combination of 97.3% sensitivity and 88.61% precision directly addresses the core operational failure of legacy SAST: noise volume. When security alerts are accompanied by sandboxed exploit verification, security teams transition from triaging false positives to verifying automated remediation.

Interpreting Custom Sanitization Logic

Traditional tools rely on hardcoded registries of known sanitization routines. Modern enterprise software regularly implements domain-specific encoding and validation. Agentic reasoning enables Cyfendo Alpha to interpret custom defenses in context, preventing safe logic from triggering false alarms.

Deployment Economics and Scaling

While multi-stage agentic reasoning incurs higher per-scan compute costs than simple static linters, the downstream elimination of manual triage delivers a compelling net operational ROI in enterprise environments.

Benchmark Scope & Generalization Beyond Synthetic Java

The OWASP Benchmark v1.2 represents a standardized, reproducible baseline for evaluating taint propagation across 2,740 test cases. Because the benchmark suite is publicly accessible, standard foundation models are vulnerable to test-set memorization. Cyfendo guards against memorization artifacts by coupling LLM semantic reasoning with deterministic AST structural verification and dynamic sandbox execution. While the OWASP Benchmark suite evaluates Java servlets, Cyfendo's underlying agentic pipeline operates on language-agnostic semantic control-flow graphs, extending diagnostic capabilities to modern polyglot ecosystems (TypeScript, Python, Go) and cloud infrastructure architectures, with ongoing evaluations across real-world CVE corpora.

Conclusion #

These benchmark results demonstrate strong diagnostic performance for Cyfendo's agentic approach on OWASP Benchmark v1.2. Achieving a Youden’s Index of 0.84, 97.3% Sensitivity, and 88.61% Precision across 2,740 test cases, Cyfendo Alpha demonstrates that autonomous, multi-layer AppSec can be deployed with high precision in modern CI/CD pipelines while developers retain full approval authority over merged code.

Citation

BibTeX
@techreport{cyfendo2026owasp,
  title       = {Cyfendo Agentic Scanning on the OWASP Benchmark},
  author      = {{Cyfendo Autonomous Security Research Team}},
  institution = {Cyfendo Inc.},
  year        = {2026},
  month       = {August},
  version     = {Alpha},
  url         = {https://cyfendo.com/whitepaper},
  note        = {Evaluated on OWASP Benchmark v1.2 (2,740 test cases, Youden Index: 0.84)}
}

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