CVE-2026-4104 Security Alert: CRITICAL Vulnerability

Urgent: CVE-2026-4104 requires immediate attention.

· 7 min read

Executive Summary

CVE-2026-4104 is a critical authorization bypass in Akmer Informatics Automation Industry and Trade Ltd. Co. TeknoPass caused by a User-Controlled SQL primary key issue that can lead to SQL injection. The affected range is TeknoPass 20210501 through 20260429. Even though this issue is not currently in CISA KEV and there are no confirmed reports of exploitation in the wild, the CVSS 9.8 rating means you should treat it as an urgent production risk.

For solo developers and small teams, the main danger is that a single exposed endpoint or admin workflow can be used to bypass access controls, read or modify data, or potentially take over the application’s database-backed functions. If TeknoPass is internet-facing or used for authentication, scheduling, access control, or device management, prioritize patching and isolation immediately.

Immediate Action

  • Isolate TeknoPass from public access until patched: restrict by VPN, firewall, or allowlist.
  • Upgrade immediately to the first fixed release: TODO: vendor-fixed-version or later. If no fixed build is available yet, disable the affected module or roll back to a known-safe architecture.
  • Rotate credentials for the TeknoPass database account, service account, and any API keys exposed to the app.
  • Review logs for unusual SQL errors, unexpected primary key values, repeated auth failures, or requests with suspicious numeric/string payloads.
  • Apply vendor guidance as soon as available: Vendor advisory / patch notes.
  • Back up before changes so you can roll back quickly if the upgrade affects auth or database behavior.

Affected Versions

  • TeknoPass 20210501 through TeknoPass 20260429 are vulnerable.
  • Safe versions: TODO: first-fixed-version and later.
  • If your deployment uses a bundled appliance, container image, or vendor repackaging, treat it as vulnerable unless the vendor explicitly states it includes the fix.

Resolution Guide

1) Patch or upgrade first. If you manage TeknoPass through a package manager, use the vendor’s fixed release once identified. Replace the placeholder version below with the confirmed fixed build.

# npm / yarn / pnpm (if TeknoPass is distributed as a JS package)
npm i tekno-pass@TODO:fixed-version
yarn add tekno-pass@TODO:fixed-version
pnpm add tekno-pass@TODO:fixed-version

# Python
pip install --upgrade tekno-pass==TODO:fixed-version
pipx upgrade tekno-pass

# Java (Maven)
mvn versions:use-latest-releases -Dincludes=com.akmer:teknopass
# then pin to the fixed version in pom.xml:
# <version>TODO:fixed-version</version>

# Java (Gradle)
./gradlew dependencyUpdates
# then set:
# implementation 'com.akmer:teknopass:TODO:fixed-version'

# Linux packages
sudo apt-get update && sudo apt-get install --only-upgrade teknopass
sudo yum update teknopass

# Docker
docker pull akmer/teknopass:TODO:fixed-version
docker compose up -d --force-recreate

2) Harden configuration while you patch. Disable any feature that accepts user-controlled record IDs, admin lookup by numeric ID, or direct object access paths. If TeknoPass has a feature flag or module switch, turn off the vulnerable workflow.

# Example hardening ideas (adapt to your config)
TEKNOPASS_DISABLE_DIRECT_ID_LOOKUPS=true
TEKNOPASS_DISABLE_ADMIN_API=true
TEKNOPASS_READ_ONLY_MODE=true

3) Minimal code fix pattern. The core issue is trusting a user-supplied primary key. Replace string-concatenated SQL or direct ID use with parameterized queries and server-side authorization checks.

// Vulnerable
const sql = `SELECT * FROM users WHERE id = ${req.query.id}`;

// Safer
const id = Number(req.query.id);
if (!Number.isInteger(id)) return res.status(400).send('Invalid id');

const sql = 'SELECT * FROM users WHERE id = ? AND tenant_id = ?';
db.query(sql, [id, req.user.tenantId]);

Detection & Verification

Check your version first. Confirm whether your installed build falls in the vulnerable range.

# Examples: adapt to your deployment
teknopass --version
dpkg -l | grep -i teknopass
rpm -qa | grep -i teknopass
docker image ls | grep -i teknopass
grep -Rni "20210501\|20260429\|TeknoPass" /opt/teknopass /etc 2>/dev/null

Look for risky code paths. Search for SQL built from request parameters, especially primary keys, IDs, or auth-related fields.

grep -RniE "SELECT .*id.*\$\{|SELECT .*id.*\+|query\(|execute\(" .
grep -RniE "req\.query\.id|request\.getParameter\(\"id\"\)|params\.id" .

Use dependency and container checks. If TeknoPass is embedded in a larger app, run your normal auditors and image scanners:

npm audit
pip audit
mvn -q dependency:tree
./gradlew dependencies
docker scout cves akmer/teknopass:TODO:tag
trivy image akmer/teknopass:TODO:tag

Verify the fix. After upgrading, confirm the version and test that malformed ID-based requests are rejected with 400/403, not processed by SQL.

# Confirm version
teknopass --version

# Smoke test expected rejection
curl -i "https://YOUR-TEKNOPASS/endpoint?id=1%20OR%201%3D1"
curl -i "https://YOUR-TEKNOPASS/endpoint?id=abc"

Risk and Impact

This flaw can let an attacker bypass authorization checks by manipulating a primary key that the application should control, turning a simple request into unauthorized database access. Depending on how TeknoPass is deployed, the blast radius may include account takeover, data exposure, privilege escalation, or tampering with business-critical records. If the service is tied to authentication or operational control, assume compromise of one endpoint could affect the entire tenant or environment.

Bottom line: patch or isolate TeknoPass now, verify the fix, and assume any user-controlled ID path is unsafe until proven otherwise.

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