CVE-2026-86117Public exploitNetwork attack vector

Account takeover via unverified OAuth email matching

Published Sep 5, 2026 · Updated Sep 10, 2026

Authentication bypass in coolLabs Coolify 4.3.17 and earlier allows remote attackers to take over accounts through an enabled OAuth provider. OauthController::callback lowercases the provider-supplied email, selects the first local user with that address, and calls Auth::login without verifying or binding the provider identity. An attacker must control the victim's email address at an enabled provider; a successful flow bypasses the password and two-factor authentication.

CVSS severity9.2
Critical
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in coolLabs Coolify 4.3.17 and earlier allows remote attackers to take over accounts through an enabled OAuth provider. OauthController::callback lowercases the provider-supplied email, selects the first local user with that address, and calls Auth::login without verifying or binding the provider identity. An attacker must control the victim's email address at an enabled provider; a successful flow bypasses the password and two-factor authentication.

The record

CVE
CVE-2026-86117
Published
Sep 5, 2026
Updated
Sep 10, 2026
Vendor
coolLabs
Product
Coolify
Classifications
CWE-287, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 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=0 <=4.3.17

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

coolLabs · Coolifyversion=0 <=4.3.17

Published CVSS scores

8.1VulnCheckCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.2VulnCheckCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1078Valid Accounts

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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