What is the CVSS score of CVE-2026-39339?

CVE-2026-39339 has a CVSS 3.1 base score of 9.1 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. EPSS exploitation probability: 0.1%.

Which versions of PHP are affected by CVE-2026-39339?

ChurchCRM versions before 7.1.0 contain a critical authentication bypass in the API middleware that allows unauthenticated attackers to access protected endpoints by manipulating URL paths,…. A patch is available.

Is there a public PoC exploit available for CVE-2026-39339?

Yes, a public proof-of-concept exploit is available for CVE-2026-39339. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-39339?

Within 24 hours: identify all ChurchCRM instances in your environment and document current versions; verify network access controls restricting API endpoints to authorized users only. Within 7 days: upgrade all ChurchCRM deployments to version 7.1.0 or later; test API endpoints post-upgrade to confirm authentication enforcement. Within 30 days: conduct audit of API access logs for indicators of path manipulation exploitation; review member data access for unauthorized access events during the vulnerability window.

PHP CVE-2026-39339

EUVD-2026-19839 CRITICAL

Improper Access Control (CWE-284)

2026-04-07 security-advisories@github.com

PHP Authentication Bypass

9.1

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

9.1 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 05:45 EUVD-patch-fix

executive_summary

Re-analysis Queued

Apr 16, 2026 - 05:29 backfill_euvd_patch

patch_released

Patch available

Apr 16, 2026 - 05:29 EUVD

7.1.0

EUVD ID Assigned

Apr 07, 2026 - 18:22 euvd

EUVD-2026-19839

Analysis Generated

Apr 07, 2026 - 18:22 vuln.today

CVE Published

Apr 07, 2026 - 18:16 nvd

CRITICAL 9.1

DescriptionGitHub Advisory

ChurchCRM is an open-source church management system. Prior to 7.1.0, a critical authentication bypass vulnerability in ChurchCRM's API middleware (ChurchCRM/Slim/Middleware/AuthMiddleware.php) allows unauthenticated attackers to access all protected API endpoints by including "api/public" anywhere in the request URL, leading to complete exposure of church member data and system information. This vulnerability is fixed in 7.1.0.

AnalysisAI

Authentication bypass in ChurchCRM API middleware enables unauthenticated remote attackers to access all protected endpoints by manipulating URL paths with 'api/public' strings, exposing complete church member databases and system configurations. Affects ChurchCRM versions prior to 7.1.0 with critical CVSS 9.1 rating. …

Unlock full vulnerability intelligence

Risk assessment & exploitation conditions
Attack chain visualization
Remediation with exact patch versions
Threat intelligence from 22 sources
Personal watchlist & email alerts

Continue with Google Continue with GitHub

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Craft HTTP request with 'api/public' in URL

Exploit

Bypass AuthMiddleware authentication check

Execution

Access protected API endpoints

Impact

Retrieve sensitive church member data

Access

Craft HTTP request with 'api/public' in URL

Exploit

Bypass AuthMiddleware authentication check

Execution

Access protected API endpoints

Impact

Retrieve sensitive church member data

Vulnerability AssessmentAI

Exploitation	Remote unauthenticated attacker exploits ChurchCRM versions prior to 7.1.0 by including 'api/public' anywhere in API request URL to bypass AuthMiddleware.php authentication checks. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	This vulnerability presents critical real-world risk despite absence of confirmed active exploitation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An external attacker scans the internet for ChurchCRM installations using Shodan or similar reconnaissance tools, identifying instances by characteristic login pages or HTTP headers. The attacker crafts HTTP requests to protected API endpoints such as '/api/members/list' but injects 'api/public' into the URL path (e.g., '/api/public/../members/list' or '/api/members/list?path=api/public'). …
Remediation	Immediately upgrade to ChurchCRM version 7.1.0 which contains the authentication bypass fix. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: identify all ChurchCRM instances in your environment and document current versions; verify network access controls restricting API endpoints to authorized users only. …

Threat intelligence, references, and detailed analysis are available after sign-in.

More from same product – last 7 days

CVE-2026-49952 CRITICAL Act Now POC

9.3 Jun 15

Authentication bypass in Discuz! X5.0 releases 20260320 through 20260501 allows unauthenticated remote attackers to acce

CVE-2026-49954 HIGH This Week POC

8.6 Jun 15

Authenticated remote code execution in Discuz! X5.0 releases 20260320 through 20260501 allows administrators to chain a

CVE-2026-49768 CRITICAL Act Now

9.8 Jun 15

Unauthenticated PHP Object Injection in the Happyforms WordPress plugin (versions <= 1.26.13) allows remote attackers to

CVE-2026-27053 CRITICAL Act Now

9.8 Jun 15

Unauthenticated PHP Object Injection in the Broadcast Live Video WordPress plugin (versions prior to 7.1.3) allows remot

CVE-2026-49104 CRITICAL Act Now

9.8 Jun 15

Unauthenticated PHP object injection in the WordPress plugin 'Integration for Keap/Infusionsoft and Contact Form 7, WPFo

CVE-2026-39339 vulnerability details – vuln.today

Back

PHP CVE-2026-39339

Severity by source

CVSS VectorGitHub Advisory

Lifecycle Timeline

DescriptionGitHub Advisory

AnalysisAI

Unlock full vulnerability intelligence

Attack ChainAIDerived

Vulnerability AssessmentAI

Recommended ActionAI

More from same product – last 7 days

Share

External POC / Exploit Code