CVE-2026-41896Public exploitNetwork attack vector

Unauthenticated deployment trigger via empty-key HMAC

Published Jun 29, 2026 · Updated Jun 29, 2026

Improper authentication in Coolify before 4.0.0-beta.474 allows remote attackers to trigger deployments through forged webhooks. The GitHub, Bitbucket, and Gitea webhook controllers pass a nullable manual webhook secret to hash_hmac(), which coerces null to a predictable empty key. Applications created without an explicitly configured webhook secret are exposed by default, allowing forged HMAC signatures to enqueue unauthorized deployments.

CVSS severity7.5
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Coolify before 4.0.0-beta.474 allows remote attackers to trigger deployments through forged webhooks. The GitHub, Bitbucket, and Gitea webhook controllers pass a nullable manual webhook secret to hash_hmac(), which coerces null to a predictable empty key. Applications created without an explicitly configured webhook secret are exposed by default, allowing forged HMAC signatures to enqueue unauthorized deployments.

The record

CVE
CVE-2026-41896
Published
Jun 29, 2026
Updated
Jun 29, 2026
Vendor
coolLabs
Product
Coolify
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 4.0.0-beta.474

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

coolLabs · Coolifyversion=< 4.0.0-beta.474

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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