Common Weakness Enumeration

CWE-287

Discouraged

Improper Authentication

Abstraction: Class · Status: Draft

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

6369 vulnerabilities reference this CWE, most recent first.

CVE-2026-58253 (GCVE-0-2026-58253)

Vulnerability from cvelistv5 – Published: 2026-07-08 19:43 – Updated: 2026-07-09 13:35

Title

NATS Server: Route API Auth Bypass

Summary

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.0, 2.12.7, and 2.11.16, when no_auth_user was configured, a parser fast path intended for ordinary client connections could also apply to route or leafnode listeners, allowing an unauthenticated peer to bypass inter-server CONNECT authentication and operate with the privileges associated with that connection type. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16.

Severity

8.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-09 13:35 UTC

CWE

CWE-287 - Improper Authentication

Assigner

GitHub_M mitre root

References

7 references

URL	Tags
https://github.com/nats-io/nats-server/security/a…	x_refsource_CONFIRM
https://github.com/nats-io/nats-server/commit/7b8…	x_refsource_MISC
https://github.com/nats-io/nats-server/commit/8b8…	x_refsource_MISC
https://github.com/nats-io/nats-server/commit/b86…	x_refsource_MISC
https://github.com/nats-io/nats-server/releases/t…	x_refsource_MISC
https://github.com/nats-io/nats-server/releases/t…	x_refsource_MISC
https://github.com/nats-io/nats-server/releases/t…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
nats-io	nats-server	Affected: < 2.11.16 Affected: >= 2.12.0-preview.1, < 2.12.6

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JSON

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CVE-2026-58075 (GCVE-0-2026-58075)

Vulnerability from cvelistv5 – Published: 2026-08-04 15:56 – Updated: 2026-08-05 13:33

Summary

A vulnerability allowing an unauthenticated attacker to read arbitrary files from the host, which can be further leveraged toescalate privileges locally.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-05 03:57 UTC

CWE

CWE-287 - Improper Authentication - Generic

Assigner

hackerone mitre root

References

1 reference

URL	Tags
https://www.veeam.com/kb4892

Impacted products

1 product

Vendor	Product	Version
Veeam	ONE	Affected: 0 , ≤ 13.0.2 (semver)

Show details on NVD website

JSON

To clipboard

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CVE-2026-58066 (GCVE-0-2026-58066)

Vulnerability from cvelistv5 – Published: 2026-07-30 06:03 – Updated: 2026-07-31 03:55

Summary

Rocket.Chat's SAML SSO before versions 8.7.0, 8.6.1, 8.5.2, 8.4.5, 8.3.7, 8.2.7, 8.1.7, 8.0.8, and 7.10.14 verified XML signatures but did not bind the validated signature to samlp:Response / saml:Assertion. An attacker could submit a wrapped document carrying forged identity attributes alongside any valid signature made by the trusted IdP certificate, and log in as an arbitrary user.

Severity

9.8 (Critical)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-30 00:00 UTC

CWE

CWE-287 - Improper Authentication - Generic

Assigner

hackerone mitre root

References

2 references

URL	Tags
https://hackerone.com/reports/3827674
https://github.com/RocketChat/Rocket.Chat/pull/41233

Impacted products

1 product

Vendor	Product	Version
Rocket.Chat	Rocket.Chat	Affected: 0 , < 8.7.0 (semver) Affected: 0 , < 8.6.1 (semver) Affected: 0 , < 8.5.2 (semver) Affected: 0 , < 8.4.5 (semver) Affected: 0 , < 8.3.7 (semver) Affected: 0 , < 8.2.7 (semver) Affected: 0 , < 8.1.7 (semver) Affected: 0 , < 8.0.8 (semver) Affected: 0 , < 7.10.14 (semver)

Credits

jayden (0jayden)

Show details on NVD website

JSON

To clipboard

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CVE-2026-57216 (GCVE-0-2026-57216)

Vulnerability from cvelistv5 – Published: 2026-07-10 20:20 – Updated: 2026-07-13 14:01

Title

RabbitMQ: AMQP 1.0, AMQP 0-9-1, Stream Protocol loopback enforcement can lead to remote guest sessions due to listener-address loopback checks

Summary

RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a loopback-restricted user such as guest to connect remotely when traffic is accepted through a trusted PROXY-protocol path and the backend listener is loopback-bound because the loopback check uses the listener-side socket address instead of the real client source. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.

Severity

6.8 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-13 14:00 UTC

CWE

CWE-287 - Improper Authentication

Assigner

GitHub_M mitre root

References

6 references

URL	Tags
https://github.com/rabbitmq/rabbitmq-server/secur…	x_refsource_CONFIRM
https://github.com/rabbitmq/rabbitmq-server/pull/15936	x_refsource_MISC
https://github.com/rabbitmq/rabbitmq-server/pull/15940	x_refsource_MISC
https://github.com/rabbitmq/rabbitmq-server/commi…	x_refsource_MISC
https://github.com/rabbitmq/rabbitmq-server/commi…	x_refsource_MISC
https://github.com/rabbitmq/rabbitmq-server/relea…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
rabbitmq	rabbitmq-server	Affected: >= 4.2.0, < 4.2.6 Affected: >= 4.1.0, < 4.1.11 Affected: >= 4.0.0, < 4.0.21 Affected: >= 3.13.0, < 3.13.15

Show details on NVD website

JSON

To clipboard

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CVE-2026-57107 (GCVE-0-2026-57107)

Vulnerability from cvelistv5 – Published: 2026-07-14 17:05 – Updated: 2026-08-31 15:25

Title

Windows Admin Center Elevation of Privilege Vulnerability

Summary

Improper authentication in Windows Admin Center allows an authorized attacker to elevate privileges locally.

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-15 04:01 UTC

CWE

CWE-287 - Improper Authentication

Assigner

microsoft mitre root

References

1 reference

URL	Tags
https://msrc.microsoft.com/update-guide/vulnerabi…	vendor-advisorypatch

Impacted products

1 product

Vendor	Product	Version
Microsoft	Windows Admin Center	Affected: 1809.0 , < 2.7.4 (custom) cpe:2.3:a:microsoft:windows_admin_center::::::::

Date Public

2026-07-14 14:00

Show details on NVD website

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CVE-2026-56850 (GCVE-0-2026-56850)

Vulnerability from cvelistv5 – Published: 2026-07-30 06:02 – Updated: 2026-07-30 12:37

Summary

A flaw in Node.js HTTPS Agent connection reuse can cause PFX object-array key collisions, allowing mutual TLS (mTLS) client identities to be reused across requests configured with different client certificates. This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.

Severity

4.1 (Medium)


                        
                          CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-30 12:37 UTC

CWE

CWE-287 - Improper Authentication - Generic

Assigner

hackerone mitre root

References

1 reference

URL	Tags
https://nodejs.org/en/blog/vulnerability/july-202…

Impacted products

1 product

Vendor	Product	Version
nodejs	node	Affected: 26.5.0 , ≤ 26.5.0 (semver) Affected: 24.18.0 , ≤ 24.18.0 (semver) Affected: 22.23.1 , ≤ 22.23.1 (semver)

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To clipboard

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CVE-2026-56793 (GCVE-0-2026-56793)

Vulnerability from cvelistv5 – Published: 2026-08-07 12:08 – Updated: 2026-08-08 03:55

Summary

Dell OpenManage Server Administrator, versions prior to 11.1.0.2, contains an Improper Authentication vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to Unauthorized access.

Severity

7.7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-07 00:00 UTC

CWE

CWE-287 - Improper Authentication

Assigner

dell mitre root

References

1 reference

URL	Tags
https://www.dell.com/support/kbdoc/en-us/00049495…	vendor-advisory

Impacted products

4 products

Vendor	Product	Version
Dell	OpenManage Server Administrator Managed Node (Patch) for Windows	Affected: 0 , < 11.1.0.2 (semver)
Dell	Dell OpenManage Server Administrator Managed Node for RHEL 8.10	Affected: 0 , < 11.1.0.2 (semver)
Dell	Dell OpenManage Server Administrator Managed Node for RHEL 9.4	Affected: 0 , < 11.1.0.2 (semver)
Dell	Dell OpenManage Server Administrator Managed Node for SLES 15	Affected: 0 , < 11.1.0.2 (semver)

Date Public

2026-08-03 06:30

Credits

CVE-2026-56793: Dell would like to thank Huynh Dinh Vu (WinD39) for reporting this issue.

Show details on NVD website

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CVE-2026-56675 (GCVE-0-2026-56675)

Vulnerability from cvelistv5 – Published: 2026-07-10 15:39 – Updated: 2026-07-10 16:55

Title

9router: Reverse proxy locality collapse allows unauthenticated access to 9router /v1 APIs

Summary

9Router is an AI router & token saver. Prior to 0.5.2, 9router treats loopback requests as trusted and allows /v1/* access without an API key, so a same-host reverse proxy that forwards public traffic to the backend through 127.0.0.1 causes src/dashboardGuard.js to misclassify external requests as local. A remote unauthenticated attacker can access /v1 APIs such as /v1/models and may abuse configured upstream provider credentials through /v1 proxy endpoints depending on enabled providers. This issue is fixed in version 0.5.2.

Severity

8.3 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-10 16:54 UTC

CWE

CWE-287 - Improper Authentication
CWE-290 - Authentication Bypass by Spoofing
CWE-306 - Missing Authentication for Critical Function
CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/decolua/9router/security/advis…	x_refsource_CONFIRM
https://github.com/decolua/9router/commit/da66783…	x_refsource_MISC
https://github.com/decolua/9router/releases/tag/v0.5.2	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
decolua	9router	Affected: < 0.5.2

Show details on NVD website

JSON

To clipboard

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              "type": "CWE"
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          ]
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              "cweId": "CWE-306",
              "description": "CWE-306: Missing Authentication for Critical Function",
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              "type": "CWE"
            }
          ]
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              "cweId": "CWE-441",
              "description": "CWE-441: Unintended Proxy or Intermediary (\u0027Confused Deputy\u0027)",
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              "type": "CWE"
            }
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          "url": "https://github.com/decolua/9router/security/advisories/GHSA-x5c9-v98j-722r"
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        "advisory": "GHSA-x5c9-v98j-722r",
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      "title": "9router: Reverse proxy locality collapse allows unauthenticated access to 9router /v1 APIs"
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CVE-2026-56666 (GCVE-0-2026-56666)

Vulnerability from cvelistv5 – Published: 2026-07-10 17:37 – Updated: 2026-07-13 18:09

Title

ZITADEL: Auto-linking by email: IdP-side email verification is not checked

Summary

ZITADEL is an open source identity management platform. Prior to 4.15.3, ZITADEL's external identity provider handler checks that the local user's email is verified but does not verify that the external IdP confirmed ownership of the same email before auto-linking by email, allowing a permissive provider account with a victim email address to be linked to the victim's local account. This issue is fixed in version 4.15.3.

Severity

4.8 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-13 18:09 UTC

CWE

CWE-287 - Improper Authentication

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/zitadel/zitadel/security/advis…	x_refsource_CONFIRM
https://github.com/zitadel/zitadel/commit/c97012f…	x_refsource_MISC
https://github.com/zitadel/zitadel/releases/tag/v4.15.3	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
zitadel	zitadel	Affected: < 4.15.3

Show details on NVD website

JSON

To clipboard

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CVE-2026-56353 (GCVE-0-2026-56353)

Vulnerability from cvelistv5 – Published: 2026-07-15 11:25 – Updated: 2026-07-16 15:14

Title

n8n - Authentication Bypass in Chat Trigger Node

Summary

n8n contains an authentication bypass in the Chat Trigger node when configured with n8n User Auth (a non-default configuration). In affected releases — before 1.123.22, the 2.0.0 through 2.9.2 line, and 2.10.0 — the authentication check on the Chat Trigger webhook endpoint can be circumvented, allowing access without valid credentials. Fixed in 1.123.22, 2.9.3, and 2.10.1.

Severity

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

4.8 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-16 15:13 UTC

CWE

CWE-287 - Improper Authentication

Assigner

VulnCheck mitre root

References

2 references

URL	Tags
https://github.com/n8n-io/n8n/security/advisories…	vendor-advisory
https://www.vulncheck.com/advisories/n8n-authenti…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
n8n	n8n	Affected: 0 , < 1.123.22 (semver) Unaffected: 1.123.22 (semver) Affected: 2.0.0 , < 2.9.3 (semver) Unaffected: 2.9.3 (semver) Affected: 2.10.0 , < 2.10.1 (semver) Unaffected: 2.10.1 (semver) cpe:2.3:a:n8n:n8n::::::node.js::* cpe:2.3:a:n8n:n8n::::::node.js::* cpe:2.3:a:n8n:n8n::::::node.js::*

Date Public

2026-02-25 00:00

Credits

sm1ee

Show details on NVD website

JSON

To clipboard

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Mitigation

Architecture and Design

Strategy: Libraries or Frameworks

Use an authentication framework or library such as the OWASP ESAPI Authentication feature.

CAPEC-114: Authentication Abuse

An attacker obtains unauthorized access to an application, service or device either through knowledge of the inherent weaknesses of an authentication mechanism, or by exploiting a flaw in the authentication scheme's implementation. In such an attack an authentication mechanism is functioning but a carefully controlled sequence of events causes the mechanism to grant access to the attacker.

CAPEC-115: Authentication Bypass

An attacker gains access to application, service, or device with the privileges of an authorized or privileged user by evading or circumventing an authentication mechanism. The attacker is therefore able to access protected data without authentication ever having taken place.

CAPEC-151: Identity Spoofing

Identity Spoofing refers to the action of assuming (i.e., taking on) the identity of some other entity (human or non-human) and then using that identity to accomplish a goal. An adversary may craft messages that appear to come from a different principle or use stolen / spoofed authentication credentials.

CAPEC-194: Fake the Source of Data

An adversary takes advantage of improper authentication to provide data or services under a falsified identity. The purpose of using the falsified identity may be to prevent traceability of the provided data or to assume the rights granted to another individual. One of the simplest forms of this attack would be the creation of an email message with a modified "From" field in order to appear that the message was sent from someone other than the actual sender. The root of the attack (in this case the email system) fails to properly authenticate the source and this results in the reader incorrectly performing the instructed action. Results of the attack vary depending on the details of the attack, but common results include privilege escalation, obfuscation of other attacks, and data corruption/manipulation.

CAPEC-22: Exploiting Trust in Client

An attack of this type exploits vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by communicating directly with the server where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.

CAPEC-57: Utilizing REST's Trust in the System Resource to Obtain Sensitive Data

This attack utilizes a REST(REpresentational State Transfer)-style applications' trust in the system resources and environment to obtain sensitive data once SSL is terminated.

CAPEC-593: Session Hijacking

This type of attack involves an adversary that exploits weaknesses in an application's use of sessions in performing authentication. The adversary is able to steal or manipulate an active session and use it to gain unathorized access to the application.

CAPEC-633: Token Impersonation

An adversary exploits a weakness in authentication to create an access token (or equivalent) that impersonates a different entity, and then associates a process/thread to that that impersonated token. This action causes a downstream user to make a decision or take action that is based on the assumed identity, and not the response that blocks the adversary.

CAPEC-650: Upload a Web Shell to a Web Server

By exploiting insufficient permissions, it is possible to upload a web shell to a web server in such a way that it can be executed remotely. This shell can have various capabilities, thereby acting as a "gateway" to the underlying web server. The shell might execute at the higher permission level of the web server, providing the ability the execute malicious code at elevated levels.

CAPEC-94: Adversary in the Middle (AiTM)

An adversary targets the communication between two components (typically client and server), in order to alter or obtain data from transactions. A general approach entails the adversary placing themself within the communication channel between the two components.

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