Common Weakness Enumeration

CWE-306

Missing Authentication for Critical Function

The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

CVE-2026-54036 (GCVE-0-2026-54036)

Vulnerability from cvelistv5 – Published: 2026-06-25 15:39 – Updated: 2026-06-25 16:01

Title

LibreChat: 2FA Re-enrollment Allows Full Account 2FA Takeover Without OTP Verification

Summary

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the GET /api/auth/2fa/enable endpoint can be called by an authenticated user (or attacker with a stolen session) even when 2FA is already fully enabled on the account. This endpoint overwrites the existing TOTP secret, generates new backup codes, and sets twoFactorEnabled to false — all without requiring any TOTP or backup code verification. An attacker with a valid session token can completely take over a victim's 2FA, locking the legitimate user out of their own two-factor authentication. This vulnerability is fixed in 0.8.4-rc1.

Severity

5.3 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

GitHub_M

References

1 reference

URL	Tags
https://github.com/danny-avila/LibreChat/security…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
danny-avila	LibreChat	Affected: < 0.8.4-rc1

Show details on NVD website

JSON

To clipboard

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CVE-2026-54040 (GCVE-0-2026-54040)

Vulnerability from cvelistv5 – Published: 2026-06-25 15:45 – Updated: 2026-06-25 18:13

Title

LibreChat: 2FA Backup Code Regeneration Without OTP Verification Allows 2FA Bypass

Summary

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the POST /api/auth/2fa/backup/regenerate endpoint regenerates all 2FA backup codes without requiring any TOTP token or existing backup code verification. An attacker with a stolen session token can silently replace a victim's backup codes and use them to bypass 2FA login or disable 2FA entirely. This vulnerability is fixed in 0.8.4-rc1.

Severity

5.9 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

GitHub_M

References

1 reference

URL	Tags
https://github.com/danny-avila/LibreChat/security…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
danny-avila	LibreChat	Affected: < 0.8.4-rc1

Show details on NVD website

JSON

To clipboard

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CVE-2026-54068 (GCVE-0-2026-54068)

Vulnerability from cvelistv5 – Published: 2026-06-24 21:15 – Updated: 2026-06-25 13:21

Title

SiYuan: Unauthenticated SQLite Data Exfiltration via Template Injection in /api/icon/getDynamicIcon

Summary

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, the /api/icon/getDynamicIcon endpoint is explicitly excluded from authentication in SiYuan's kernel router (router.go, "不需要鉴权" -- no auth needed). When called with type=8 and a valid block id parameter, this endpoint invokes RenderDynamicIconContentTemplate, which executes a Go template that includes the querySQL and queryBlocks functions. These functions run arbitrary SELECT statements against the SiYuan SQLite database. An unauthenticated network-adjacent attacker who knows a valid block ID can exfiltrate all user note content, tags, asset references, and block attributes from the database. This vulnerability is fixed in 3.7.0.

Severity

5.9 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

GitHub_M

References

1 reference

URL	Tags
https://github.com/siyuan-note/siyuan/security/ad…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
siyuan-note	siyuan	Affected: < 3.7.0

Show details on NVD website

JSON

To clipboard

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CVE-2026-54088 (GCVE-0-2026-54088)

Vulnerability from cvelistv5 – Published: 2026-06-25 17:49 – Updated: 2026-06-25 18:36

Title

File Browser: Command Injection via Authentication Hook Shell Substitution (Pre-Authentication RCE)

Summary

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.6, the Hook Authentication feature in File Browser allows administrators to delegate login verification to an external shell command. User-supplied credentials (username and password) are interpolated into this command string using os.Expand without sanitization. An unauthenticated remote attacker can inject shell metacharacters in the username or password field at the login screen, causing the server to execute arbitrary OS commands before any authentication takes place. This is a critical pre-authentication RCE. This vulnerability is fixed in 2.63.6.

Severity

9.3 (Critical)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-88 - Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
CWE-306 - Missing Authentication for Critical Function

Assigner

GitHub_M

References

1 reference

URL	Tags
https://github.com/filebrowser/filebrowser/securi…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
filebrowser	filebrowser	Affected: < 2.63.6

Show details on NVD website

JSON

To clipboard

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CVE-2026-54103 (GCVE-0-2026-54103)

Vulnerability from cvelistv5 – Published: 2026-06-18 16:12 – Updated: 2026-06-22 12:32 Exclusively Hosted Service

Title

U.S. GAO EPDS and CBCA EDS unauthenticated password change

Summary

The U.S. Government Accountability Office (GAO) Electronic Protest Docketing System (EPDS) and Civilian Board of Contract Appeals (CBCA) Electronic Docketing System (EDS) does not authenticate password change requests to the '/update-profile/N' API endpoint. A remote, unauthenticated attacker could change an arbitrary user's password.

Severity

9.8 (Critical)


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

9.3 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

cisa-cg

References

4 references

URL	Tags
https://raw.githubusercontent.com/cisagov/CSAF/de…
https://www.cve.org/CVERecord?id=CVE-2026-54103	vdb-entry
https://epds.gao.gov/	product
https://www.eds.cbca.gov/login	product

Impacted products

2 products

Vendor	Product	Version
Government Accountability Office	Electronic Protest Docketing System (EPDS)	Affected: 0 , < 2026-02-22 (custom) Unaffected: 2026-02-22
Civilian Board of Contract Appeals	Electronic Docketing System (EDS)	Affected: 0 , < 2026-03-19 (custom) Unaffected: 2026-03-19

Date Public

2026-06-18 00:00

Credits

Blake Rash, CISA

Show details on NVD website

JSON

To clipboard

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CVE-2026-54130 (GCVE-0-2026-54130)

Vulnerability from cvelistv5 – Published: 2026-06-18 21:42 – Updated: 2026-06-26 19:40 Exclusively Hosted Service

Title

M365 Copilot Information Disclosure Vulnerability

Summary

Missing authentication for critical function in M365 Copilot allows an unauthorized attacker to disclose information over a network.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/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 (v2.0.3)

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

microsoft

References

1 reference

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

Impacted products

1 product

Vendor	Product	Version
Microsoft	Microsoft 365 Copilot	Affected: -

Date Public

2026-06-18 14:00

Show details on NVD website

JSON

To clipboard

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CVE-2026-54309 (GCVE-0-2026-54309)

Vulnerability from cvelistv5 – Published: 2026-06-23 15:36 – Updated: 2026-06-23 15:45

Title

n8n: n8n MCP Browser HTTP Transport Exposes Unauthenticated Browser-Control Sessions

Summary

n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, when @n8n/mcp-browser is run in HTTP transport mode, the MCP endpoint accepts session initialization and tool invocation requests without any authentication. Any network-reachable client, or any website visited by the user, can establish an MCP session and invoke browser-control tools. Where the n8n AI Browser Bridge extension is installed and a browser connection is active, an unauthenticated caller can access browser-control capabilities including navigation, JavaScript evaluation, and cookie and storage access against the user's real browser profile. This issue only affects instances where @n8n/mcp-browser is run with the HTTP transport (--transport http). This vulnerability is fixed in 2.25.7 and 2.26.2.

Severity

8.8 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

GitHub_M

References

1 reference

URL	Tags
https://github.com/n8n-io/n8n/security/advisories…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
n8n-io	n8n	Affected: >= 2.26.0, < 2.26.2 Affected: < 2.25.7

Show details on NVD website

JSON

To clipboard

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CVE-2026-54317 (GCVE-0-2026-54317)

Vulnerability from cvelistv5 – Published: 2026-06-23 17:39 – Updated: 2026-06-26 19:00

Title

Home Assistant: Konnected alarm-panel switch state and zone topology disclosed to unauthenticated actors on the LAN

Summary

Home Assistant is open source home automation software that puts local control and privacy first. Prior to 2026.6.0, the Konnected integration registers an HTTP endpoint, KonnectedView (homeassistant/components/konnected/__init__.py), that is marked as not requiring authentication (requires_auth = False). A comment next to that line says auth is instead handled "via the access token from configuration." That promise is only half true. Write requests (POST and PUT) are handled by update_sensor(), which does check the request's Authorization: Bearer <token> header against the integration's stored access tokens (using hmac.compare_digest). Read requests (GET) are handled by a separate get() method that has no authentication check at all. This vulnerability is fixed in 2026.6.0.

Severity

7.6 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
CWE-306 - Missing Authentication for Critical Function

Assigner

GitHub_M

References

1 reference

URL	Tags
https://github.com/home-assistant/core/security/a…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
home-assistant	core	Affected: < 2026.6.0

Show details on NVD website

JSON

To clipboard

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CVE-2026-55196 (GCVE-0-2026-55196)

Vulnerability from cvelistv5 – Published: 2026-06-17 17:58 – Updated: 2026-06-23 16:16 X_Open Source

Title

Hermes WebUI < 0.51.409 - Unauthenticated Passkey Registration via Authentication Bypass

Summary

Hermes WebUI before 0.51.409 contains an authentication bypass vulnerability in passkey registration endpoints that allows unauthenticated remote attackers to register arbitrary passkeys. When HERMES_WEBUI_PASSKEY=1 is enabled with no existing credentials, POST /api/auth/passkey/register/options and POST /api/auth/passkey/register endpoints are accessible without authentication, allowing attackers to claim the first passkey and gain permanent administrative control.

Severity

9.1 (Critical)


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

9.1 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

VulnCheck

References

5 references

URL	Tags
https://github.com/nesquena/hermes-webui/releases…	release-notes
https://github.com/nesquena/hermes-webui/pull/4171	issue-tracking
https://github.com/nesquena/hermes-webui/pull/4267	issue-tracking
https://github.com/nesquena/hermes-webui/commit/4…	patch
https://www.vulncheck.com/advisories/hermes-webui…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
hermes-webui	hermes-webui	Affected: 0 , < 0.51.409 (semver) Unaffected: 0.51.409 (semver)

Date Public

2026-06-14 00:00

Credits

Chia Min Jun Lennon

Show details on NVD website

JSON

To clipboard

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CVE-2026-55450 (GCVE-0-2026-55450)

Vulnerability from cvelistv5 – Published: 2026-06-23 16:17 – Updated: 2026-06-23 17:02

Title

Langflow: Unauthenticated file upload leads to DoS (space exhaustion) and information leak

Summary

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.1, unauthenticated users can upload any amount of data to the server without any limitations. No need for any prior knowledge, only network access to Langflow. This can lead to space exhaustion on the server. In addition, in the response, the absolute path of the uploaded file is reported to the attacker, which is an information leak that can assist in chaining other primitives. This vulnerability is fixed in 1.9.1.

Severity

9.3 (Critical)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
CWE-306 - Missing Authentication for Critical Function
CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M

References

2 references

URL	Tags
https://github.com/langflow-ai/langflow/security/…	x_refsource_CONFIRM
https://github.com/langflow-ai/langflow/pull/12831	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
langflow-ai	langflow	Affected: < 1.9.1

Show details on NVD website

JSON

To clipboard

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Mitigation

Phase: Architecture and Design

Description:

Divide the software into anonymous, normal, privileged, and administrative areas. Identify which of these areas require a proven user identity, and use a centralized authentication capability.
Identify all potential communication channels, or other means of interaction with the software, to ensure that all channels are appropriately protected, including those channels that are assumed to be accessible only by authorized parties. Developers sometimes perform authentication at the primary channel, but open up a secondary channel that is assumed to be private. For example, a login mechanism may be listening on one network port, but after successful authentication, it may open up a second port where it waits for the connection, but avoids authentication because it assumes that only the authenticated party will connect to the port.
In general, if the software or protocol allows a single session or user state to persist across multiple connections or channels, authentication and appropriate credential management need to be used throughout.

Mitigation ID: MIT-15

Phase: Architecture and Design

Description:

For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.

Mitigation

Phase: Architecture and Design

Description:

Where possible, avoid implementing custom, "grow-your-own" authentication routines and consider using authentication capabilities as provided by the surrounding framework, operating system, or environment. These capabilities may avoid common weaknesses that are unique to authentication; support automatic auditing and tracking; and make it easier to provide a clear separation between authentication tasks and authorization tasks.
In environments such as the World Wide Web, the line between authentication and authorization is sometimes blurred. If custom authentication routines are required instead of those provided by the server, then these routines must be applied to every single page, since these pages could be requested directly.

Mitigation ID: MIT-4.5

Phase: Architecture and Design

Strategy: Libraries or Frameworks

Description:

Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
For example, consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator [REF-45].

Mitigation

Phases: Implementation, System Configuration, Operation

Description:

When storing data in the cloud (e.g., S3 buckets, Azure blobs, Google Cloud Storage, etc.), use the provider's controls to require strong authentication for users who should be allowed to access the data [REF-1297] [REF-1298] [REF-1302].

CAPEC-12: Choosing Message Identifier

This pattern of attack is defined by the selection of messages distributed via multicast or public information channels that are intended for another client by determining the parameter value assigned to that client. This attack allows the adversary to gain access to potentially privileged information, and to possibly perpetrate other attacks through the distribution means by impersonation. If the channel/message being manipulated is an input rather than output mechanism for the system, (such as a command bus), this style of attack could be used to change the adversary's identifier to more a privileged one.

CAPEC-166: Force the System to Reset Values

An attacker forces the target into a previous state in order to leverage potential weaknesses in the target dependent upon a prior configuration or state-dependent factors. Even in cases where an attacker may not be able to directly control the configuration of the targeted application, they may be able to reset the configuration to a prior state since many applications implement reset functions.

CAPEC-216: Communication Channel Manipulation

An adversary manipulates a setting or parameter on communications channel in order to compromise its security. This can result in information exposure, insertion/removal of information from the communications stream, and/or potentially system compromise.

CAPEC-36: Using Unpublished Interfaces or Functionality

An adversary searches for and invokes interfaces or functionality that the target system designers did not intend to be publicly available. If interfaces fail to authenticate requests, the attacker may be able to invoke functionality they are not authorized for.

CAPEC-62: Cross Site Request Forgery

An attacker crafts malicious web links and distributes them (via web pages, email, etc.), typically in a targeted manner, hoping to induce users to click on the link and execute the malicious action against some third-party application. If successful, the action embedded in the malicious link will be processed and accepted by the targeted application with the users' privilege level. This type of attack leverages the persistence and implicit trust placed in user session cookies by many web applications today. In such an architecture, once the user authenticates to an application and a session cookie is created on the user's system, all following transactions for that session are authenticated using that cookie including potential actions initiated by an attacker and simply "riding" the existing session cookie.

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