CWE-295
Improper Certificate Validation
The product does not validate, or incorrectly validates, a certificate.
CVE-2026-27134 (GCVE-0-2026-27134)
Vulnerability from cvelistv5 – Published: 2026-02-20 23:05 – Updated: 2026-02-25 21:32
VLAI
Title
Strimzi: All CAs from a custom CA chain consisting of multiple CAs are trusted for mTLS user autentication
Summary
Strimzi provides a way to run an Apache Kafka cluster on Kubernetes or OpenShift in various deployment configurations. In versions 0.49.0 through 0.50.0, when using a custom Cluster or Clients CA with a multistage CA chain consisting of multiple CAs, Strimzi incorrectly configures the trusted certificates for mTLS authentication on the internal as well as user-configured listeners. All CAs from the CA chain will be trusted. And users with certificates signed by any of the CAs in the chain will be able to authenticate. This issue affects only users using a custom Cluster or Clients CA with a multistage CA chain consisting of multiple CAs. It does not affect users using the Strimzi-managed Cluster and Clients CAs. It also does not affect users using custom Cluster or Clients CA with only a single CA (i.e., no CA chain with multiple CAs). This issue has been fixed in version 0.50.1. To workaround this issue, instead of providing the full CA chain as the custom CA, users can provide only the single CA that should be used.
Severity
8.1 (High)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/strimzi/strimzi-kafka-operator… | x_refsource_CONFIRM |
| https://github.com/strimzi/strimzi-kafka-operator… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| strimzi | strimzi-kafka-operator |
Affected:
>= 0.49.0, < 0.50.1
|
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CVE-2026-27221 (GCVE-0-2026-27221)
Vulnerability from cvelistv5 – Published: 2026-03-10 21:41 – Updated: 2026-03-11 13:08
VLAI
Title
Acrobat Reader | Improper Certificate Validation (CWE-295)
Summary
Acrobat Reader versions 24.001.30307, 24.001.30308, 25.001.21265 and earlier are affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to spoof the identity of a signer. Exploitation of this issue requires user interaction.
Severity
5.5 (Medium)
CWE
- CWE-295 - Improper Certificate Validation (CWE-295)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Acrobat Reader |
Affected:
0 , ≤ 25.001.21265
(semver)
|
Date Public
2026-03-10 17:00
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CVE-2026-2748 (GCVE-0-2026-2748)
Vulnerability from cvelistv5 – Published: 2026-03-04 08:48 – Updated: 2026-03-04 16:55
VLAI
Title
S/MIME Certificate Subject Whitespace
Summary
SEPPmail Secure Email Gateway before version 15.0.1 improperly validates S/MIME certificates issued for email addresses containing whitespaces, allowing signature spoofing.
Severity
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://downloads.seppmail.com/extrelnotes/150/ER… | release-notes |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SEPPmail | Secure Email Gateway |
Affected:
0 , < 15.0.1
(custom)
|
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CVE-2026-29140 (GCVE-0-2026-29140)
Vulnerability from cvelistv5 – Published: 2026-04-02 08:27 – Updated: 2026-04-02 14:48
VLAI
Title
S/MIME Signature Additional Certificate
Summary
SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to cause attacker-controlled certificates to be used for future encryption to a victim by adding the certificates to S/MIME signatures.
Severity
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://downloads.seppmail.com/extrelnotes/150/ER… | release-notes |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SEPPmail | Secure Email Gateway |
Affected:
0 , < 15.0.3
(custom)
|
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CVE-2026-30794 (GCVE-0-2026-30794)
Vulnerability from cvelistv5 – Published: 2026-03-05 15:24 – Updated: 2026-03-17 14:34
VLAI
Title
RustDesk HTTP Client Silently Accepts Invalid TLS Certificates After Handshake Failure
Summary
Improper Certificate Validation vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android (HTTP API client, TLS transport modules) allows Adversary in the Middle (AiTM). This vulnerability is associated with program files src/hbbs_http/http_client.Rs and program routines TLS retry with danger_accept_invalid_certs(true).
This issue affects RustDesk Client: through 1.4.5.
Severity
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/rustdesk/rustdesk | product |
| https://docs.google.com/document/d/e/2PACX-1vSds6… | third-party-advisoryexploit |
| https://www.vulsec.org/ | vdb-entrythird-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| rustdesk-client | RustDesk Client |
Affected:
0 , ≤ 1.4.5
(custom)
|
Date Public
2026-03-05 13:45
Credits
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CVE-2026-30836 (GCVE-0-2026-30836)
Vulnerability from cvelistv5 – Published: 2026-03-19 20:37 – Updated: 2026-03-25 14:16
VLAI
Title
Step CA: Unauthenticated Certificate Issuance via SCEP UpdateReq (MessageType=18)
Summary
Step CA is an online certificate authority for secure, automated certificate management for DevOps. Versions 0.30.0-rc6 and below do not safeguard against unauthenticated certificate issuance through the SCEP UpdateReq. This issue has been fixed in version 0.30.0.
Severity
10 (Critical)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/smallstep/certificates/securit… | x_refsource_CONFIRM |
| https://github.com/smallstep/certificates/commit/… | x_refsource_MISC |
| https://github.com/smallstep/certificates/release… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| smallstep | certificates |
Affected:
< 0.30.0
|
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CVE-2026-30840 (GCVE-0-2026-30840)
Vulnerability from cvelistv5 – Published: 2026-03-07 05:39 – Updated: 2026-03-09 20:24
VLAI
Title
Wallos: Server-Side Request Forgery (SSRF) in Notification Testers
Summary
Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.6.2, there is a server-side request forgery vulnerability in notification testers. This issue has been patched in version 4.6.2.
Severity
8.8 (High)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/ellite/Wallos/security/advisor… | x_refsource_CONFIRM |
| https://github.com/ellite/Wallos/commit/e8a513591… | x_refsource_MISC |
| https://github.com/ellite/Wallos/releases/tag/v4.6.2 | x_refsource_MISC |
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CVE-2026-3100 (GCVE-0-2026-3100)
Vulnerability from cvelistv5 – Published: 2026-02-25 05:52 – Updated: 2026-02-27 14:26
VLAI
Title
An improper certificate validation vulnerability was found in the FTP Backup on the ADM.
Summary
The FTP Backup on the ADM will not properly strictly enforce TLS certificate verification while connecting to an FTP server using FTPES/FTPS. An improper validated TLS/SSL certificates allows a remote attacker can intercept network traffic to perform a Man-in-the-Middle (MitM) attack, which may intercept, modify, or obtain sensitive information such as authentication credentials and backup data.
Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.ROF1 as well as from ADM 5.0.0 through ADM 5.1.2.RE51.
Severity
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.asustor.com/security/security_advisor… | vendor-advisory |
Impacted products
Date Public
2026-02-25 05:45
Credits
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CVE-2026-31798 (GCVE-0-2026-31798)
Vulnerability from cvelistv5 – Published: 2026-03-13 19:15 – Updated: 2026-03-13 19:38
VLAI
Title
JumpServer Improper Certificate Validation in Custom SMS API Client
Summary
JumpServer is an open source bastion host and an operation and maintenance security audit system. Prior to v4.10.16-lts, JumpServer improperly validates certificates in the Custom SMS API Client. When JumpServer sends MFA/OTP codes via Custom SMS API, an attacker can intercept the request and capture the verification code BEFORE it reaches the user's phone. This vulnerability is fixed in v4.10.16-lts.
Severity
5 (Medium)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/jumpserver/jumpserver/security… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| jumpserver | jumpserver |
Affected:
< 4.10.16-lts
|
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CVE-2026-32144 (GCVE-0-2026-32144)
Vulnerability from cvelistv5 – Published: 2026-04-07 12:28 – Updated: 2026-04-07 14:38
VLAI
Title
OCSP designated-responder authorization bypass via missing signature verification
Summary
Improper Certificate Validation vulnerability in Erlang OTP public_key (pubkey_ocsp module) allows OCSP designated-responder authorization bypass via missing signature verification.
The OCSP response validation in public_key:pkix_ocsp_validate/5 does not verify that a CA-designated responder certificate was cryptographically signed by the issuing CA. Instead, it only checks that the responder certificate's issuer name matches the CA's subject name and that the certificate has the OCSPSigning extended key usage. An attacker who can intercept or control OCSP responses can create a self-signed certificate with a matching issuer name and the OCSPSigning EKU, and use it to forge OCSP responses that mark revoked certificates as valid.
This affects SSL/TLS clients using OCSP stapling, which may accept connections to servers with revoked certificates, potentially transmitting sensitive data to compromised servers. Applications using the public_key:pkix_ocsp_validate/5 API directly are also affected, with impact depending on usage context.
This vulnerability is associated with program files lib/public_key/src/pubkey_ocsp.erl and program routines pubkey_ocsp:is_authorized_responder/3.
This issue affects OTP from OTP 27.0 until OTP 28.4.2 and 27.3.4.10 corresponding to public_key from 1.16 until 1.20.3 and 1.17.1.2, and ssl from 11.2 until 11.5.4 and 11.2.12.7.
Severity
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/erlang/otp/security/advisories… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-32144.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-32144 | related |
| https://www.erlang.org/doc/system/versions.html#o… | x_version-scheme |
| https://github.com/erlang/otp/commit/ac7ff528be85… | patch |
| https://github.com/erlang/otp/commit/49033a6d93a5… | patch |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Erlang | OTP |
Affected:
1.16 , < *
(otp)
cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:* |
|
| Erlang | OTP |
Affected:
11.2 , < *
(otp)
cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:* |
|
| Erlang | OTP |
Affected:
27.0 , < *
(otp)
Affected: 601a012837ea0a5c8095bf24223132824177124d , < * (git) cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:* |
Credits
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Mitigation
Phases: Architecture and Design, Implementation
Description:
- Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
Mitigation
Phase: Implementation
Description:
- 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.