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CWE-290
Authentication Bypass by Spoofing
This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.
CVE-2026-55202 (GCVE-0-2026-55202)
Vulnerability from cvelistv5 – Published: 2026-06-17 19:13 – Updated: 2026-06-23 02:03 X_Open Source
VLAI
EPSS
VEX
Title
Tinyproxy - Stathost Detection Bypass via Host Header Manipulation
Summary
Tinyproxy through 1.11.3, fixed in commit 09312a1, fails to properly validate the Host header during stathost detection, allowing unauthenticated attackers to access the stats page by injecting a matching Host header or bypass detection via port manipulation. Remote attackers can trigger unauthorized access to internal proxy statistics or misroute requests as transparent proxy connections to circumvent access controls.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/tinyproxy/tinyproxy/pull/606 | issue-tracking |
| https://github.com/tinyproxy/tinyproxy/commit/093… | patch |
| https://www.vulncheck.com/advisories/evil-winrm-p… | third-party-advisory |
Impacted products
Date Public
2026-04-17 00:00
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CVE-2026-55641 (GCVE-0-2026-55641)
Vulnerability from cvelistv5 – Published: 2026-07-10 15:36 – Updated: 2026-07-10 19:06
VLAI
EPSS
VEX
Title
9router: Unauthenticated `/v1` proxy access via `Host`-header spoofing → open AI relay + SSRF
Summary
9Router is an AI router & token saver. Prior to 0.5.2, 9router determines whether a /v1 LLM proxy request is local by reading the client-controlled Host header, allowing a remote unauthenticated attacker to send Host: localhost and bypass API-key authentication. In the default configuration, this exposes the /v1 proxy to upstream provider calls using stored provider credentials and allows /v1/search with the searxng provider_options.baseUrl parameter to drive server-side requests to internal or cloud-metadata hosts. This issue is fixed in version 0.5.2.
Severity
8.2 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/decolua/9router/security/advis… | x_refsource_CONFIRM |
| https://github.com/decolua/9router/commit/b282f05… | x_refsource_MISC |
| https://github.com/decolua/9router/releases/tag/v0.5.2 | x_refsource_MISC |
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CVE-2026-56020 (GCVE-0-2026-56020)
Vulnerability from cvelistv5 – Published: 2026-06-18 16:12 – Updated: 2026-06-22 12:33
VLAI
EPSS
VEX
Title
Webmin HTTP header authentication bypass
Summary
The Webmin HTTP server (miniserv.pl) allows unauthenticated attackers to impersonate any user with a configured SSL client certificate by sending a forged HTTP header. A remote attacker can spoof certificate DNs and authenticate as any user. Fixed in 2.641.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/webmin/webmin/releases/tag/2.641 | release-notes |
| https://webmin.com/security/#webmin-prior-to-2641 | release-notes |
| https://raw.githubusercontent.com/cisagov/CSAF/de… | |
| https://www.cve.org/CVERecord?id=CVE-2026-56020 | vdb-entry |
Impacted products
Date Public
2026-06-18 00:00
Credits
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CVE-2026-56357 (GCVE-0-2026-56357)
Vulnerability from cvelistv5 – Published: 2026-06-22 21:04 – Updated: 2026-06-23 14:25
VLAI
EPSS
VEX
Title
n8n - Webhook Forgery via Missing HMAC-SHA256 Signature Verification in GitHub Webhook Trigger
Summary
n8n before 1.123.15 and 2.5.0 contains a webhook forgery vulnerability in the GitHub Webhook Trigger node that fails to implement HMAC-SHA256 signature verification. Attackers who know the webhook URL can send unsigned POST requests to trigger workflows with arbitrary data, spoofing GitHub webhook events.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories… | vendor-advisory |
| https://www.vulncheck.com/advisories/n8n-webhook-… | third-party-advisory |
Impacted products
Date Public
2026-02-25 00:00
Credits
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CVE-2026-56360 (GCVE-0-2026-56360)
Vulnerability from cvelistv5 – Published: 2026-07-08 13:49 – Updated: 2026-07-08 14:26
VLAI
EPSS
VEX
Title
n8n - Webhook Forgery via Unsigned POST Requests in ZendeskTrigger
Summary
n8n before versions 1.123.18 and 2.6.2 fails to verify HMAC-SHA256 signatures on Zendesk webhooks in the ZendeskTrigger node. Attackers who know the webhook URL can send unsigned POST requests to trigger workflows with arbitrary malicious data.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories… | vendor-advisory |
| https://www.vulncheck.com/advisories/n8n-webhook-… | third-party-advisory |
Impacted products
Date Public
2026-02-25 00:00
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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
VLAI
EPSS
VEX
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)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
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 |
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CVE-2026-5792 (GCVE-0-2026-5792)
Vulnerability from cvelistv5 – Published: 2026-06-12 14:26 – Updated: 2026-06-15 11:22
VLAI
EPSS
VEX
Title
Authentication Bypass in Hedef Media's Related Marketing Cloud (RMC)
Summary
Authentication bypass by spoofing vulnerability in Hedef Media Promotion Interactive Media Marketing Inc. Related Marketing Cloud (RMC) allows Brute Force.
This issue affects Related Marketing Cloud (RMC): through 12052026.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-290 - Authentication bypass by spoofing
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://siberguvenlik.gov.tr/guvenlik-bildirimler… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Hedef Media Promotion Interactive Media Marketing Inc. | Related Marketing Cloud (RMC) |
Affected:
0 , ≤ 12052026
(custom)
|
Date Public
2026-06-12 14:20
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CVE-2026-58370 (GCVE-0-2026-58370)
Vulnerability from cvelistv5 – Published: 2026-06-30 15:57 – Updated: 2026-07-02 03:56 X_Open Source
VLAI
EPSS
VEX
Title
Woodpecker < 3.15.0 - GitLab Approval Gate Bypass via Spoofable Commit Author Name
Summary
Woodpecker before 3.15.0 matches the ApprovalAllowedUsers bypass list against pipeline.Author. For the GitLab forge driver, pipeline.Author is populated from the git commit author name (commit.author.name) carried in the webhook payload, which is attacker-controlled and not verified by GitLab. A user who can open a merge request from a fork can set the commit author name to match an entry in ApprovalAllowedUsers, causing needsApproval to return false so the pipeline runs without the required approval. This defeats the fork-approval security boundary and allows execution of attacker-controlled pipeline steps on a Woodpecker agent and exfiltration of CI secrets exposed to the run. Other built-in forge drivers (Gitea, Forgejo, GitHub, Bitbucket) derive pipeline.Author from the forge-validated sender/actor identity and are not affected.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/woodpecker-ci/woodpecker/relea… | release-notes |
| https://github.com/woodpecker-ci/woodpecker/pull/6653 | issue-tracking |
| https://github.com/woodpecker-ci/woodpecker/commi… | patch |
| https://www.vulncheck.com/advisories/woodpecker-g… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| woodpecker-ci | woodpecker |
Affected:
0 , < 3.15.0
(semver)
|
Date Public
2026-05-27 00:00
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CVE-2026-58593 (GCVE-0-2026-58593)
Vulnerability from cvelistv5 – Published: 2026-07-01 19:27 – Updated: 2026-07-07 12:50
VLAI
EPSS
VEX
Title
NodeBB - ActivityPub Author Spoofing via Unvalidated attributedTo Mapped to Local User
Summary
NodeBB does not bind the claimed author of an inbound ActivityPub object to the authenticated remote actor. The inbound middleware verifies the HTTP-signature actor and checks the origin of object.id, but never validates that attributedTo corresponds to the sender. In the object mock, attributedTo is used directly as a uid, and actors.assert silently ignores numeric identifiers (filtering them out without re-deriving the uid), so a federated remote actor can set attributedTo to a bare numeric value such as 1 and have the resulting post or private message created with that local uid as author, including the administrator account. This lets a remote attacker forge posts and direct messages attributed to arbitrary local users. Requires the ActivityPub/federation feature to be enabled.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/bikini/exploitarium/tree/main/… | exploit |
| https://github.com/NodeBB/NodeBB/blob/v4.13.2/src… | product |
| https://www.vulncheck.com/advisories/nodebb-activ… | third-party-advisory |
Date Public
2026-07-01 00:00
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CVE-2026-59224 (GCVE-0-2026-59224)
Vulnerability from cvelistv5 – Published: 2026-07-09 17:09 – Updated: 2026-07-10 03:55
VLAI
EPSS
VEX
Title
Open WebUI: Terminal proxy forwards a spoofable, integrity-unbound user identity to the upstream (X-User-Id header and ws_terminal session_id query injection)
Summary
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, backend/open_webui/routers/terminals.py built the ws_terminal upstream URL from an unencoded session_id and appended user_id as a query parameter, allowing query injection to make the terminal backend resolve another user identity; the HTTP proxy path also forwarded X-User-Id as an integrity-unbound identity claim. This issue is fixed in version 0.10.0.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/open-webui/open-webui/security… | x_refsource_CONFIRM |
| https://github.com/open-webui/open-webui/pull/26042 | x_refsource_MISC |
| https://github.com/open-webui/open-webui/commit/5… | x_refsource_MISC |
| https://github.com/open-webui/open-webui/releases… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-webui | open-webui |
Affected:
< 0.10.0
|
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No mitigation information available for this CWE.
CAPEC-21: Exploitation of Trusted Identifiers
An adversary guesses, obtains, or "rides" a trusted identifier (e.g. session ID, resource ID, cookie, etc.) to perform authorized actions under the guise of an authenticated user or service.
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-459: Creating a Rogue Certification Authority Certificate
An adversary exploits a weakness resulting from using a hashing algorithm with weak collision resistance to generate certificate signing requests (CSR) that contain collision blocks in their "to be signed" parts. The adversary submits one CSR to be signed by a trusted certificate authority then uses the signed blob to make a second certificate appear signed by said certificate authority. Due to the hash collision, both certificates, though different, hash to the same value and so the signed blob works just as well in the second certificate. The net effect is that the adversary's second X.509 certificate, which the Certification Authority has never seen, is now signed and validated by that Certification Authority.
CAPEC-461: Web Services API Signature Forgery Leveraging Hash Function Extension Weakness
An adversary utilizes a hash function extension/padding weakness, to modify the parameters passed to the web service requesting authentication by generating their own call in order to generate a legitimate signature hash (as described in the notes), without knowledge of the secret token sometimes provided by the web service.
CAPEC-473: Signature Spoof
An attacker generates a message or datablock that causes the recipient to believe that the message or datablock was generated and cryptographically signed by an authoritative or reputable source, misleading a victim or victim operating system into performing malicious actions.
CAPEC-476: Signature Spoofing by Misrepresentation
An attacker exploits a weakness in the parsing or display code of the recipient software to generate a data blob containing a supposedly valid signature, but the signer's identity is falsely represented, which can lead to the attacker manipulating the recipient software or its victim user to perform compromising actions.
CAPEC-59: Session Credential Falsification through Prediction
This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.
CAPEC-60: Reusing Session IDs (aka Session Replay)
This attack targets the reuse of valid session ID to spoof the target system in order to gain privileges. The attacker tries to reuse a stolen session ID used previously during a transaction to perform spoofing and session hijacking. Another name for this type of attack is Session Replay.
CAPEC-667: Bluetooth Impersonation AttackS (BIAS)
An adversary disguises the MAC address of their Bluetooth enabled device to one for which there exists an active and trusted connection and authenticates successfully. The adversary can then perform malicious actions on the target Bluetooth device depending on the target’s capabilities.
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.