OWASP Top 10 2024 Africa SaaS: 2026 remediation guide

OWASP Top 10 = list of 10 most critical web vulns updated by OWASP Foundation. 2024-2025 edition active. 90% SME breaches exploit one of these vulns. Here's the remediation guide for African SME SaaS.

TL;DR

1. Broken Access Control

2. Cryptographic Failures

3. Injection

4. Insecure Design

5. Security Misconfiguration

6. Vulnerable Components

7. Identification & Auth Failures

8. Software & Data Integrity Failures

9. Security Logging Failures

10. SSRF

A01 — Broken Access Control

#1 vuln 2024. 94% apps tested affected.

Typical vulns:

• IDOR (Insecure Direct Object Reference)
• Missing function level access control
• Force browsing

African SaaS example:

`

GET /api/invoices/12345

→ You access another tenant's invoice

`

Fix:

`typescript

// ❌ Vulnerable

async function getInvoice(req, res) {

const invoice = await db.invoices.findOne({ id: req.params.id });

res.json(invoice);

}

// ✅ Secure

async function getInvoice(req, res) {

const invoice = await db.invoices.findOne({

id: req.params.id,

tenantId: req.user.tenantId // Crucial

});

if (!invoice) return res.status(404).end();

res.json(invoice);

}

`

A02 — Cryptographic Failures

Typical vulns:

• Plaintext / weakly hashed (MD5, SHA1) passwords
• TLS 1.0/1.1 (deprecated)
• Sensitive data over HTTP

Fix:

`typescript

import bcrypt from 'bcrypt';

// ❌

const hash = md5(password);

// ✅

const hash = await bcrypt.hash(password, 12); // Cost factor 12+

`

Minimum TLS 1.3 in 2026. Cloudflare enforces it.

A03 — Injection

SQL, NoSQL, LDAP, OS command.

Fix:

`typescript

// ❌

const users = await db.query(SELECT * FROM users WHERE name = '${name}');

// ✅

const users = await db.query('SELECT * FROM users WHERE name = ?', [name]);

// ✅ Prisma / Mongoose ORMs protect automatically

const users = await prisma.user.findMany({ where: { name } });

`

A04 — Insecure Design

Design flaws not patched by lib update.

Examples:

• Password reset with easy-guess security questions
• Public API without rate limit
• Exploitable business logic workflows

Fix: Threat modeling at design phase.

A05 — Security Misconfiguration

Typical vulns:

• S3 cloud bucket accidentally public
• Default credentials unchanged
• Verbose error messages
• Missing headers (CSP, HSTS, X-Frame-Options)

Fix:

`typescript

// Express middleware

import helmet from 'helmet';

app.use(helmet({

contentSecurityPolicy: {

directives: {

defaultSrc: ["'self'"],

scriptSrc: ["'self'", "https://js.stripe.com"],

},

},

hsts: { maxAge: 31536000 },

}));

`

A06 — Vulnerable Components

Dependencies with known CVEs.

Fix:

`bash

# Regular audit

npm audit

yarn audit

pip-audit

# GitHub Dependabot

# Renovate bot

# Snyk

# Regular update

npm update

`

SMEs should run npm audit in CI/CD.

A07 — Identification & Auth Failures

Typical vulns:

• Login brute-force
• Session fixation
• Weak JWT secret
• No 2FA

Fix:

`typescript

// Rate limit login

import rateLimit from 'express-rate-limit';

app.post('/login', rateLimit({

windowMs: 15 * 60 * 1000,

max: 5,

message: 'Too many attempts, retry in 15min'

}), loginHandler);

// JWT strong secret + rotation

const JWT_SECRET = process.env.JWT_SECRET; // 256-bit min

// 2FA via TOTP (Google Authenticator)

import speakeasy from 'speakeasy';

`

A08 — Software & Data Integrity

Typical vulns:

• Compromised CI/CD
• Auto-update without signature
• Insecure deserialization

Fix:

• Sign artifacts (cosign, sigstore)
• SLSA framework
• Dependency provenance

A09 — Security Logging Failures

No logs = no breach detection.

Fix:

`typescript

// Structured logging

import pino from 'pino';

const logger = pino({

level: 'info',

redact: ['password', 'token', '*.creditCard'], // Mask sensitive

});

// Log auth events

logger.info({

event: 'login_success',

userId: user.id,

ip: req.ip,

userAgent: req.headers['user-agent']

});

logger.warn({

event: 'login_failed',

email: req.body.email,

ip: req.ip

});

// Ship to Datadog / Loki / CloudWatch

`

Retention 90d-1y per compliance.

A10 — SSRF (Server-Side Request Forgery)

Server makes requests to user-controlled URLs.

Vuln:

`typescript

// ❌

app.get('/proxy', async (req, res) => {

const data = await fetch(req.query.url); // SSRF !

res.send(await data.text());

});

`

Fix:

`typescript

// ✅ Whitelist domains

const ALLOWED = ['api.partner.com'];

const url = new URL(req.query.url);

if (!ALLOWED.includes(url.hostname)) return res.status(400).end();

// Block internal IPs

if (isInternalIP(url.hostname)) return res.status(400).end();

`

OWASP audit tools

• OWASP ZAP (free DAST)
• Burp Suite Pro ($499/year)
• Nessus / Nuclei (vuln scan)
• Snyk / Dependabot (deps)
• SonarQube (SAST)
• Semgrep (SAST custom rules)

2026 SME OWASP checklist

• [ ] Tenant scoping verified all API routes
• [ ] Bcrypt cost 12+ passwords
• [ ] TLS 1.3 mandatory
• [ ] Helmet Express middleware
• [ ] Strict CSP headers
• [ ] Login + sensitive APIs rate limiting
• [ ] Mandatory admin 2FA
• [ ] Dependabot / Renovate enabled
• [ ] SAST (Semgrep) at CI/CD
• [ ] DAST (ZAP) staging weekly
• [ ] Annual pentest
• [ ] Auth + sensitive action logs
• [ ] Encrypted + tested backup

FAQ

Q: OWASP Top 10 mandatory compliance?

A: Reference in PCI-DSS, SOC2, ISO 27001. Not legally mandatory but de facto standard.

Q: OWASP auditor cost?

A: Grey-box pentest ~5-15K€ covers OWASP Top 10.

Q: Mobile apps OWASP different?

A: Yes, OWASP Mobile Top 10. M1 Improper Platform Usage, M2 Insecure Data Storage, etc.

Conclusion

OWASP Top 10 2024 = standard 2026 Africa SaaS security. Broken Access Control + Cryptographic Failures + Injection = 80% breaches. Defensive stack: Helmet + bcrypt + rate limiting + WAF + regular audit + annual pentest.