Common Weakness Enumeration

CWE-295

Allowed

Improper Certificate Validation

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product does not validate, or incorrectly validates, a certificate.

851 vulnerabilities reference this CWE, most recent first.

CVE-2026-48249 (GCVE-0-2026-48249)

Vulnerability from cvelistv5 – Published: 2026-05-21 17:11 – Updated: 2026-11-08 14:04
VLAI
Title
Open ISES Tickets < 3.44.2 Disabled TLS Certificate Verification in rm/incs/mobile_login.inc.php
Summary
Open ISES Tickets before 3.44.2 disables TLS certificate verification in rm/incs/mobile_login.inc.php by setting CURLOPT_SSL_VERIFYPEER to false (and not setting CURLOPT_SSL_VERIFYHOST) when issuing outbound HTTPS requests issued during the mobile (RouteMate) login flow. An attacker positioned on the network path between the server and the remote endpoint can present a forged certificate to intercept, monitor, or modify the request and response, including any API keys or session-bearing data in transit.
Severity
8.2 (High)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-21 18:00 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
Open ISES Tickets Affected: 0 , < 3.44.2 (semver)
    cpe:2.3:a:tickets_project:tickets:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-04-02 00:00
Show details on NVD website
To clipboard 

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CVE-2026-48248 (GCVE-0-2026-48248)

Vulnerability from cvelistv5 – Published: 2026-05-21 17:11 – Updated: 2026-11-08 14:04
VLAI
Title
Open ISES Tickets < 3.44.2 Disabled TLS Certificate Verification in incs/login.inc.php
Summary
Open ISES Tickets before 3.44.2 disables TLS certificate verification in incs/login.inc.php by setting CURLOPT_SSL_VERIFYPEER to false (and not setting CURLOPT_SSL_VERIFYHOST) when issuing outbound HTTPS requests issued during the login/authentication flow. An attacker positioned on the network path between the server and the remote endpoint can present a forged certificate to intercept, monitor, or modify the request and response, including any API keys or session-bearing data in transit.
Severity
8.2 (High)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-23 02:25 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
Open ISES Tickets Affected: 0 , < 3.44.2 (semver)
    cpe:2.3:a:tickets_project:tickets:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-04-02 00:00
Show details on NVD website
To clipboard 

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CVE-2026-48247 (GCVE-0-2026-48247)

Vulnerability from cvelistv5 – Published: 2026-05-21 17:11 – Updated: 2026-11-08 14:04
VLAI
Title
Open ISES Tickets < 3.44.2 Disabled TLS Certificate Verification in incs/functions.inc.php
Summary
Open ISES Tickets before 3.44.2 disables TLS certificate verification in incs/functions.inc.php by setting CURLOPT_SSL_VERIFYPEER to false (and not setting CURLOPT_SSL_VERIFYHOST) when issuing outbound HTTPS requests for general-purpose outbound HTTPS requests issued by the shared helper functions. An attacker positioned on the network path between the server and the remote endpoint can present a forged certificate to intercept, monitor, or modify the request and response, including any API keys or session-bearing data in transit.
Severity
8.2 (High)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-21 18:05 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
Open ISES Tickets Affected: 0 , < 3.44.2 (semver)
    cpe:2.3:a:tickets_project:tickets:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-04-02 00:00
Show details on NVD website
To clipboard 

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CVE-2026-48246 (GCVE-0-2026-48246)

Vulnerability from cvelistv5 – Published: 2026-05-21 17:11 – Updated: 2026-11-08 14:04
VLAI
Title
Open ISES Tickets < 3.44.2 Disabled TLS Certificate Verification in ajax/reports.php
Summary
Open ISES Tickets before 3.44.2 disables TLS certificate verification in ajax/reports.php by setting CURLOPT_SSL_VERIFYPEER to false (and not setting CURLOPT_SSL_VERIFYHOST) when issuing outbound HTTPS requests for Google Maps Directions API lookups during incident report generation. An attacker positioned on the network path between the server and the remote endpoint can present a forged certificate to intercept, monitor, or modify the request and response, including any API keys or session-bearing data in transit.
Severity
8.2 (High)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-21 18:05 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
Open ISES Tickets Affected: 0 , < 3.44.2 (semver)
    cpe:2.3:a:tickets_project:tickets:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-04-02 00:00
Show details on NVD website
To clipboard 

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CVE-2026-48057 (GCVE-0-2026-48057)

Vulnerability from cvelistv5 – Published: 2026-11-06 21:24 – Updated: 2026-11-06 21:24
VLAI
Title
Botan: directoryName nameConstraint bypass via multi-AVA RDN flattening in matches_dn
Summary
Botan is a C++ cryptography library. Prior to 3.13.0, Botan's X.509 Distinguished Name decoder flattens the Attribute-Value Assertions in each Relative Distinguished Name and loses multi-value RDN grouping before DN name-constraint enforcement. An attacker controlling a name-constrained intermediate CA can issue a certificate with a multi-value RDN whose first Common Name matches the permitted constraint and whose second Common Name is attacker-chosen, causing the constraint check to accept the flattened first value. If the certificate contains no subjectAlternativeName extension, the second Common Name can then be accepted as a hostname; Botan does not fall back to Common Name hostname matching when any subjectAlternativeName is present. The exposure is limited to deployments using DN name constraints, which are uncommon outside internal PKIs, and to certificates without a subjectAlternativeName. This issue is fixed in version 3.13.0.
Severity
2.1 (Low)
CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
CWE
  • CWE-295 - Improper Certificate Validation
  • CWE-1023 - Incomplete Comparison with Missing Factors
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
randombit botan Affected: < 3.13.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-48021 (GCVE-0-2026-48021)

Vulnerability from cvelistv5 – Published: 2026-07-24 18:26 – Updated: 2026-07-25 00:57
VLAI
Title
epa4all Security Incident: Implement keystore based on Telematik TSL, implement hostname check and certificate check for lib-vau
Summary
In epa4all, prior to version 2026-05-20, an attacker who can intercept the TLS connection between epa4all and the ePA backend can complete the VAU handshake with attacker-controlled keys and obtain the session encryption keys. All inner HTTP traffic (patient consent decisions, medication data, document operations, authorization tokens, and entitlement queries) becomes readable and modifiable. The attacker can also inject arbitrary requests through the hijacked channel. This issue has been patched in version 2026-05-20.
Severity
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-07-25 00:56 UTC
CWE
  • CWE-295 - Improper Certificate Validation
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
med-united epa4all Affected: < 2026-05-20
Create a notification for this product.
Show details on NVD website
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CVE-2026-47632 (GCVE-0-2026-47632)

Vulnerability from cvelistv5 – Published: 2026-07-14 17:05 – Updated: 2026-11-01 17:33
VLAI
Title
Azure Connected Machine Agent Elevation of Privilege Vulnerability
Summary
Improper certificate validation in Azure Connected Machine Agent allows an unauthorized attacker to elevate privileges over an adjacent network.
Severity
8.8 (High)
CVSS:3.1/AV:A/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 · CISA-ADP (v2.0.3)
Decision recorded 2026-07-15 03:57 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
microsoft CNA
References
Impacted products
Vendor Product Version
Microsoft Azure Connected Machine Agent Affected: 1.0.0 , < 1.65 (custom)
    cpe:2.3:a:microsoft:azure_connected_machine_agent:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-07-14 14:00
Show details on NVD website
To clipboard 

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CVE-2026-47074 (GCVE-0-2026-47074)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:05 – Updated: 2026-05-29 04:40
VLAI
Title
ex_aws_sns SigningCertURL not validated in verify_message/1
Summary
Improper Certificate Validation vulnerability in ex-aws ex_aws_sns (ExAws.SNS, ExAws.SNS.PublicKeyCache modules) allows Signature Spoofing by Improper Validation. This vulnerability is associated with program files lib/ex_aws/sns.ex, lib/ex_aws/sns/public_key_cache.ex and program routines 'Elixir.ExAws.SNS':verify_message/1, 'Elixir.ExAws.SNS.PublicKeyCache':get/1. 'Elixir.ExAws.SNS':verify_message/1 fetches the signing certificate from the SigningCertURL field of the incoming SNS message without validating that the URL uses HTTPS or that the host matches an AWS-owned SNS certificate domain. An unauthenticated attacker who can POST to an endpoint that calls verify_message/1 can supply an attacker-controlled SigningCertURL, sign a forged SNS message with their own key, and cause the function to return :ok, completely bypassing SNS signature verification. This issue affects ex_aws_sns: from 2.0.1 before 2.3.5.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-28 10:29 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
EEF CNA
References
Impacted products
Vendor Product Version
ex-aws ex_aws_sns Affected: 2.0.1 , < 2.3.5 (semver)
    cpe:2.3:a:ex_aws_sns_project:ex_aws_sns:*:*:*:*:*:*:*:*
Create a notification for this product.
ex-aws ex_aws_sns Affected: a7ec21880943f4dac1d59bda557db0ffcd2b61fa , < 1853d280b152d10384a1e21a22cf22152a60be48 (git)
    cpe:2.3:a:ex_aws_sns_project:ex_aws_sns:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Peter Ullrich Bernard Duggan Jonatan Männchen / EEF Jonatan Männchen / EEF
Show details on NVD website
To clipboard 

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CVE-2026-46734 (GCVE-0-2026-46734)

Vulnerability from cvelistv5 – Published: 2026-06-25 13:43 – Updated: 2026-06-26 03:55
VLAI
Summary
Dell Display and Peripheral Manager (DDPM Mac), versions prior to 2.3, contain an Improper Certificate Validation vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Protection mechanism bypass.
Severity
7.3 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 00:00 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
dell CNA
References
Impacted products
Vendor Product Version
Dell Display and Peripheral Manager Affected: 0 , < Version 2.3 and later (custom)
Create a notification for this product.
Date Public
2026-06-16 06:30
Credits
Dell Technologies would like to thank Ori Gabriel for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-46428 (GCVE-0-2026-46428)

Vulnerability from cvelistv5 – Published: 2026-07-20 15:37 – Updated: 2026-07-21 15:49
VLAI
Title
lettre has TLS hostname verification disabled when using Boring TLS backend
Summary
lettre is a a mailer library for Rust. Starting in version 0.10.1 and prior to version 0.11.22, an inverted-boolean bug in lettre's `boring-tls` integration silently disables TLS hostname verification for callers using the default (strict) configuration. An on-path attacker presenting any chain-valid certificate for any domain can intercept SMTP submission, including PLAIN/LOGIN credentials and message contents, against any lettre user built with the `boring-tls` feature. Other TLS backends (`native-tls`, `rustls`) are unaffected. Version 0.11.22 patches the issue.
Severity
9.1 (Critical)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-21 15:48 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
lettre lettre Affected: >= 0.10.1, < 0.11.22
Create a notification for this product.
Show details on NVD website
To clipboard 

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        },
        {
          "name": "https://rustsec.org/advisories/RUSTSEC-2026-0141.html",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://rustsec.org/advisories/RUSTSEC-2026-0141.html"
        }
      ],
      "source": {
        "advisory": "GHSA-4pj9-g833-qx53",
        "discovery": "UNKNOWN"
      },
      "title": "lettre has TLS hostname verification disabled when using Boring TLS backend"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-46428",
    "datePublished": "2026-07-20T15:37:58.396Z",
    "dateReserved": "2026-05-13T22:18:22.830Z",
    "dateUpdated": "2026-07-21T15:49:36.495Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}
Mitigation
Architecture and Design Implementation

Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.

Mitigation
Implementation

If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.

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-475: Signature Spoofing by Improper Validation

An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.

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