CWE-940

Improper Verification of Source of a Communication Channel

The product establishes a communication channel to handle an incoming request that has been initiated by an actor, but it does not properly verify that the request is coming from the expected origin.

CVE-2026-33875 (GCVE-0-2026-33875)

Vulnerability from cvelistv5 – Published: 2026-03-27 20:25 – Updated: 2026-04-03 15:21
VLAI
Title
Authenticator Vulnerable to Authentication Flow Hijack
Summary
Gematik Authenticator securely authenticates users for login to digital health applications. Versions prior to 4.16.0 are vulnerable to authentication flow hijacking, potentially allowing attackers to authenticate with the identities of victim users who click on a malicious deep link. Update Gematik Authenticator to version 4.16.0 or greater to receive a patch. There are no known workarounds.
Severity
9.3 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
Impacted products
Vendor Product Version
gematik app-Authenticator Affected: < 4.16.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-35643 (GCVE-0-2026-35643)

Vulnerability from cvelistv5 – Published: 2026-04-10 16:03 – Updated: 2026-04-14 14:54 X_Open Source
VLAI
Title
OpenClaw < 2026.3.22 - Arbitrary Code Execution via Unvalidated WebView JavascriptInterface
Summary
OpenClaw before 2026.3.22 contains an unvalidated WebView JavascriptInterface vulnerability allowing attackers to inject arbitrary instructions. Untrusted pages can invoke the canvas bridge to execute malicious code within the Android application context.
Severity
8.6 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
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CISA Coordinator (v2.0.3)
CWE
  • CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
Impacted products
Vendor Product Version
OpenClaw OpenClaw Affected: 0 , < 2026.3.22 (semver)
Unaffected: 2026.3.22 (semver)
Create a notification for this product.
Date Public
2026-03-24 00:00
Credits
cyjhhh
Show details on NVD website
To clipboard 

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CVE-2026-40434 (GCVE-0-2026-40434)

Vulnerability from cvelistv5 – Published: 2026-04-17 19:49 – Updated: 2026-04-17 20:28
VLAI
Title
Anviz CrossChex Standard Improper Verification of Source of a Communication Channel
Summary
Anviz CrossChex Standard lacks source verification in the client/server channel, enabling TCP packet injection by an attacker on the same network to alter or disrupt application traffic.
Severity
8.1 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Anviz Anviz CrossChex Standard Affected: All versions
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-43880 (GCVE-0-2026-43880)

Vulnerability from cvelistv5 – Published: 2026-05-11 20:37 – Updated: 2026-05-12 12:55
VLAI
Title
WWBN AVideo: Unauthenticated Arbitrary Email Sending via sendEmail.json.php Allows Phishing from Site's Legitimate From Address
Summary
WWBN AVideo is an open source video platform. In versions up to and including 29.0, objects/sendEmail.json.php exposes two branches depending on whether contactForm=1 is submitted. When the parameter is omitted, the endpoint sets $sendTo to an attacker-supplied email and, for unauthenticated callers, uses the site's own contact email as the message From:/Reply-To:. The endpoint is explicitly allow-listed as a "public write action" in objects/functionsSecurity.php (line 885), so it requires no authentication or CSRF token. An unauthenticated attacker (solving a captcha) can force the site's own SMTP infrastructure to send attacker-composed emails to arbitrary recipients with the site's legitimate sender address, passing SPF/DKIM/DMARC for the site's domain — ideal for targeted phishing and brand impersonation. Commit 4e3709895857a5857f0edb46b0ee984de0d9e1a2 contains an updated fix.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
Impacted products
Vendor Product Version
WWBN AVideo Affected: <= 29.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-44698 (GCVE-0-2026-44698)

Vulnerability from cvelistv5 – Published: 2026-05-29 13:32 – Updated: 2026-05-29 13:58
VLAI
Title
Home Assistant: Cross-origin iframe access token exfiltration via WebView JS bridge callback injection
Summary
Home Assistant is open source home automation software that puts local control and privacy first. Prior to 2026.4.1 for iOS and 2026.4.4 for Android, he Home Assistant Companion apps for Android and iOS expose a JavaScript bridge to the in-app WebView window.externalApp on Android and webkit.messageHandlers.getExternalAuth (alongside revokeExternalAuth and externalBus) on iOS. Two flaws expose the bridge to all frames (including cross-origin iframes) and unsanitized interpolation of the JavaScript callback identifier allows a cross-origin iframe rendered inside the Companion app to execute arbitrary JavaScript in the Home Assistant frontend's main-frame origin and exfiltrate the signed-in user's access token. This vulnerability is fixed in 2026.4.1 for iOS and 2026.4.4 for Android.
Severity
8.3 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
  • CWE-346 - Origin Validation Error
  • CWE-749 - Exposed Dangerous Method or Function
  • CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2026-44894 (GCVE-0-2026-44894)

Vulnerability from cvelistv5 – Published: 2026-06-12 14:06 – Updated: 2026-06-13 03:04
VLAI
Title
Netty's Default QUIC token handler accepts any client-supplied token
Summary
Netty is a network application framework for development of protocol servers and clients. NoQuicTokenHandler is the tokenHandler used when the application does not set one. Prior to version 4.2.15.Final, its writeToken() returns false (server will not send Retry — acceptable), but validateToken() unconditionally `return 0`. In QuicheQuicServerCodec.handlePacket(), a non-negative return from validateToken() is interpreted as 'token is valid, ODCID starts at offset 0', causing the server to call quiche_accept as if the client's address had been validated by a Retry round-trip. Per RFC 9000 §8.1, a validated address lifts the 3× anti-amplification send limit. Thus any attacker who includes ANY non-empty token bytes in an Initial packet — with a spoofed victim source IP — causes the Netty server to treat the victim as validated and reflect full-size handshake flights (certificates, etc.) toward it without the 3× cap. The correct 'no token handler' semantics would be to return -1 (invalid) so the normal un-validated path and amplification limit apply. Version 4.2.15.Final patches the issue.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
Impacted products
Vendor Product Version
netty netty Affected: >= 4.2.0.Final, < 4.2.15.Final
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-45245 (GCVE-0-2026-45245)

Vulnerability from cvelistv5 – Published: 2026-05-18 19:00 – Updated: 2026-05-18 20:31 X_Open Source
VLAI
Title
Summarize < 0.15.1 Unauthorized Daemon Request via Untrusted Events
Summary
Summarize prior to 0.15.1 contains a vulnerability in the hover summary feature that allows malicious pages to dispatch synthetic mouseover events over attacker-controlled links, causing the extension to make authenticated daemon requests using stored tokens without verifying event trustworthiness. Attackers can place local or private-network URLs behind hoverable links to route authenticated requests through the daemon, potentially accessing sensitive internal endpoints when users interact with attacker-controlled content.
Severity
4.6 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N
7.4 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
  • CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
Impacted products
Vendor Product Version
steipete summarize Affected: 0 , < 0.15.1 (semver)
Unaffected: ecbb2c414255aa480a15d0d8b205224c14cfdbcb (git)
Create a notification for this product.
Date Public
2026-05-11 00:00
Credits
Chia Min Jun Lennon
Show details on NVD website
To clipboard 

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CVE-2026-45353 (GCVE-0-2026-45353)

Vulnerability from cvelistv5 – Published: 2026-05-28 17:19 – Updated: 2026-05-28 19:27
VLAI
Title
electerm: Local code through electerm's single-instance socket
Summary
electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. From 3.0.6 to 3.8.8, This vulnerability is fixed in 3.9.0.
Severity
9.3 (Critical)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
  • CWE-732 - Incorrect Permission Assignment for Critical Resource
  • CWE-940 - Improper Verification of Source of a Communication Channel
Assigner
References
Impacted products
Vendor Product Version
electerm electerm Affected: >= 3.0.6, < 3.89.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-28T19:27:17.683676Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-28T19:27:52.948Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "electerm",
          "vendor": "electerm",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.0.6, \u003c 3.89.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. From 3.0.6 to 3.8.8,  This vulnerability is fixed in 3.9.0."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-94",
              "description": "CWE-94: Improper Control of Generation of Code (\u0027Code Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-732",
              "description": "CWE-732: Incorrect Permission Assignment for Critical Resource",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-940",
              "description": "CWE-940: Improper Verification of Source of a Communication Channel",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-28T17:19:17.496Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/electerm/electerm/security/advisories/GHSA-7p5m-v798-f8vv",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/electerm/electerm/security/advisories/GHSA-7p5m-v798-f8vv"
        },
        {
          "name": "https://github.com/electerm/electerm/commit/0599e67069b00e376a2e962649aaad6096e63507",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/electerm/electerm/commit/0599e67069b00e376a2e962649aaad6096e63507"
        }
      ],
      "source": {
        "advisory": "GHSA-7p5m-v798-f8vv",
        "discovery": "UNKNOWN"
      },
      "title": "electerm: Local code through electerm\u0027s single-instance socket"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-45353",
    "datePublished": "2026-05-28T17:19:17.496Z",
    "dateReserved": "2026-05-11T21:40:08.178Z",
    "dateUpdated": "2026-05-28T19:27:52.948Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}
Mitigation

Phase: Architecture and Design

Description:

  • Use a mechanism that can validate the identity of the source, such as a certificate, and validate the integrity of data to ensure that it cannot be modified in transit using an Adversary-in-the-Middle (AITM) attack.
  • When designing functionality of actions in the URL scheme, consider whether the action should be accessible to all mobile applications, or if an allowlist of applications to interface with is appropriate.
CAPEC-500: WebView Injection

An adversary, through a previously installed malicious application, injects code into the context of a web page displayed by a WebView component. Through the injected code, an adversary is able to manipulate the DOM tree and cookies of the page, expose sensitive information, and can launch attacks against the web application from within the web page.

CAPEC-594: Traffic Injection

An adversary injects traffic into the target's network connection. The adversary is therefore able to degrade or disrupt the connection, and potentially modify the content. This is not a flooding attack, as the adversary is not focusing on exhausting resources. Instead, the adversary is crafting a specific input to affect the system in a particular way.

CAPEC-595: Connection Reset

In this attack pattern, an adversary injects a connection reset packet to one or both ends of a target's connection. The attacker is therefore able to have the target and/or the destination server sever the connection without having to directly filter the traffic between them.

CAPEC-596: TCP RST Injection

An adversary injects one or more TCP RST packets to a target after the target has made a HTTP GET request. The goal of this attack is to have the target and/or destination web server terminate the TCP connection.

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