CVE-2026-40964
Cloud Foundry cf-auth-proxy Authentication Bypass
Description
Authentication Bypass in cf-auth-proxy in Cloud Foundry Foundation all installations allows an unauthenticated remote attacker to gain read access to every log and metric for every application and platform component via minting a JWT that the cf-auth-proxy accepts as a valid logs.admin token. Affected versions: - log-cache_release: all versions through v3.2.6 (inclusive); fixed in v3.2.7 or later - CF Deployment: all versions through v55.?.0 (inclusive); fixed in v55.?.0 or later (bundles log-cache_release v3.2.7)
INFO
Published Date :
June 1, 2026, 10:16 p.m.
Last Modified :
July 22, 2026, 6:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-40964
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | dcf2e128-44bd-42ed-91e8-88f912c1401d | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update log-cache_release to v3.2.7 or later.
- Deploy CF Deployment v55.?.0 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-40964.
| URL | Resource |
|---|---|
| https://www.cloudfoundry.org/blog/cve-2026-40964-read-access-to-cf-logs/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-40964 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-40964
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40964 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40964 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 22, 2026
Action Type Old Value New Value Changed Translation Title: Cloud Foundry Foundation, Description: Omisión de autenticación en cf-auth-proxy en todas las instalaciones de Cloud Foundry Foundation permite a un atacante remoto no autenticado obtener acceso de lectura a cada registro y métrica para cada aplicación y componente de plataforma mediante la creación de un JWT que el cf-auth-proxy acepta como un token logs.admin válido. Versiones afectadas: - log-cache_release: todas las versiones hasta la v3.2.6 (inclusive); corregido en la v3.2.7 o posterior - CF Deployment: todas las versiones hasta la v55.?.0 (inclusive); corregido en la v55.?.0 o posterior (incluye log-cache_release v3.2.7) Title: Cloud Foundry Foundation, Description: Omisión de autenticación en cf-auth-proxy en todas las instalaciones de Cloud Foundry Foundation permite a un atacante remoto no autenticado obtener acceso de lectura a cada registro y métrica para cada aplicación y componente de plataforma mediante la creación de un JWT que el cf-auth-proxy acepta como un token logs.admin válido. Versiones afectadas: - log-cache_release: todas las versiones hasta la v3.2.6 (inclusive); corregido en la v3.2.7 o posterior - CF Deployment: todas las versiones hasta la v55.?.0 (inclusive); corregido en la v55.?.0 o posterior (incluye log-cache_release v3.2.7) -
CVE Translated by [email protected]
Jul. 22, 2026
Action Type Old Value New Value Added Translation Title: Cloud Foundry Foundation, Description: Omisión de autenticación en cf-auth-proxy en todas las instalaciones de Cloud Foundry Foundation permite a un atacante remoto no autenticado obtener acceso de lectura a cada registro y métrica para cada aplicación y componente de plataforma mediante la creación de un JWT que el cf-auth-proxy acepta como un token logs.admin válido. Versiones afectadas: - log-cache_release: todas las versiones hasta la v3.2.6 (inclusive); corregido en la v3.2.7 o posterior - CF Deployment: todas las versiones hasta la v55.?.0 (inclusive); corregido en la v55.?.0 o posterior (incluye log-cache_release v3.2.7) -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Cloud Foundry Foundation', 'product': 'log-cache_release', 'versions': [{'status': 'affected', 'version': '2.7.0', 'versionType': 'custom', 'lessThanOrEqual': '3.2.6'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Cloud Foundry Foundation', 'product': 'CF Deployment', 'versions': [{'status': 'affected', 'version': '12.44.0', 'versionType': 'custom', 'lessThanOrEqual': '55.2.0'}], 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-40964', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-02T13:11:40.431179Z'} -
New CVE Received by [email protected]
Jun. 01, 2026
Action Type Old Value New Value Added Description Authentication Bypass in cf-auth-proxy in Cloud Foundry Foundation all installations allows an unauthenticated remote attacker to gain read access to every log and metric for every application and platform component via minting a JWT that the cf-auth-proxy accepts as a valid logs.admin token. Affected versions: - log-cache_release: all versions through v3.2.6 (inclusive); fixed in v3.2.7 or later - CF Deployment: all versions through v55.?.0 (inclusive); fixed in v55.?.0 or later (bundles log-cache_release v3.2.7) Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-287 Added Reference https://www.cloudfoundry.org/blog/cve-2026-40964-read-access-to-cf-logs/