Read the docs
TI-2026-30298 Aliases CVE-2026-41896

Coolify: Unauthenticated Deployment Trigger via Webhook HMAC Bypass with Null Secret

Priority HIGH 72CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to 4.0.0-beta.474, the HMAC key is the application's manual_webhook_secret_github field, which is used by Coolify's webhook endpoints to validate incoming requests, is nullable with no default — meaning newly created applications have a null webhook secret. PHP's hash_hmac() function silently coerces a null key to an empty string ''. So when the secret is null, the server computes hash_hmac('sha256', $payload, '') — a deterministic value that any attacker can calculate independently. By sending X-Hub-Signature-256: sha256=<hash_hmac('sha256', payload, '')>, an unauthenticated attacker can forge a valid signature and trigger deployments. This vulnerability is fixed in 4.0.0-beta.474.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00278 20th percentileScored 2026-11-07
Fix Fixed coolify (coollabsio): 4.0.0-beta.474

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
coollabsiocoolifybefore 4.0.0-beta.4744.0.0-beta.474Patch availableCNA
  • coolify Vendorcoollabsio Affected before 4.0.0-beta.474 Fixed in 4.0.0-beta.474 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:coollabs:coolify:*:*:*:*:*:*:*:*——coollabsio
  • cpe:2.3:a:coollabs:coolify:*:*:*:*:*:*:*:* Versions — — ·coollabsio

Remediation

  • Fix · CNA coolify (coollabsio) Fixed in 4.0.0-beta.474

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-41896

References

Other 1

  • TI-2025-40716 Coolify Vulnerable to Authenticated Remote Code Execution via Command Injection in File Storage Directory Mount Path CVSS 4.0CRITICAL 9.4
  • TI-2025-40715 Coolify Vulnerable to Authenticated Remote Code Execution via Command Injection in Dynamic Proxy Configuration Filename CVSS 4.0CRITICAL 9.4
  • TI-2025-40714 Coolify Vulnerable to Authenticated Remote Code Execution via Command Injection in PostgreSQL Init Script Filename CVSS 4.0CRITICAL 9.4
  • TI-2025-40713 Coolify Vulnerable to Authenticated Remote Code Execution via Command Injection in Database Import CVSS 4.0CRITICAL 9.4
  • TI-2025-40712 Coolify Vulnerable to Authenticated Remote Code Execution via Command Injection in Database Backup CVSS 3.1CRITICAL 10.0
  • TI-2025-16498 Coolify Vulnerable to Private Key Enumeration on Onboarding resulting in Remote Command Execution (RCE) CVSS 3.1CRITICAL 10.0
See all 78 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences