erlang: Erlang OTP public_key: Certificate chain forgery via improper trust chain validation

A flaw was found in Erlang OTP's publickey module. This vulnerability CWE-295, related to improper certificate validation, allows a non-Certificate Authority CA certificate to be accepted as an intermediate issuer. A remote attacker, holding an end-entity certificate issued by a trusted CA, can...

Non-CA certificate accepted as intermediate issuer in public_key path validation

...

SUSE CVE-2026-42789

Improper Following of a Certificate's Chain of Trust vulnerability in Erlang OTP publickey pubkeycert module allows a non-CA certificate to be accepted as an intermediate issuer, enabling certificate chain forgery. In lib/publickey/src/pubkeycert.erl, pubkeycert:validateextensions/7 contains two...

CVE-2026-42789 Non-CA certificate accepted as intermediate issuer in public_key path validation

Improper Following of a Certificate's Chain of Trust vulnerability in Erlang OTP publickey pubkeycert module allows a non-CA certificate to be accepted as an intermediate issuer, enabling certificate chain forgery. In lib/publickey/src/pubkeycert.erl, pubkeycert:validateextensions/7 contains two...

CVE-2026-42789

The CVE-2026-42789 entry documents a vulnerability in Erlang OTP public_key (pubkey_cert module): a certificate with basicConstraints cA:false and no keyUsage can be misused as an intermediate issuer during pkix_path_validation, enabling chain forgery. Two flaws in pubkey_cert:validate_extensions...

EUVD-2026-32272

Improper Following of a Certificate's Chain of Trust vulnerability in Erlang OTP publickey pubkeycert module allows a non-CA certificate to be accepted as an intermediate issuer, enabling certificate chain forgery. In lib/publickey/src/pubkeycert.erl, pubkeycert:validateextensions/7 contains two...

CVE-2026-42789 Non-CA certificate accepted as intermediate issuer in public_key path validation

Improper Following of a Certificate's Chain of Trust vulnerability in Erlang OTP publickey pubkeycert module allows a non-CA certificate to be accepted as an intermediate issuer, enabling certificate chain forgery. In lib/publickey/src/pubkeycert.erl, pubkeycert:validateextensions/7 contains two...

Improper Certificate Validation

Overview Affected versions of this package are vulnerable to Improper Certificate Validation in the verifyCredentials. An attacker can impersonate a trusted client by crafting a malicious certificate when a non-CA certificate is used as a trusted certificate. Remediation Upgrade...

GHSA-6C5R-4WFC-3MCX Hashicorp Vault has Incorrect Validation for Non-CA Certificates

Vault and Vault Enterprise “Vault” TLS certificate auth method did not correctly validate client certificates when configured with a non-CA certificate as +trusted certificate+|https://developer.hashicorp.com/vault/api-docs/auth/certcertificate. In this configuration, an attacker may be able to...

CVE-2025-6037 Vault Certificate Auth Method Did Not Validate Common Name For Non-CA Certificates

Vault and Vault Enterprise “Vault” TLS certificate auth method did not correctly validate client certificates when configured with a non-CA certificate as +trusted certificate+|https://developer.hashicorp.com/vault/api-docs/auth/certcertificate. In this configuration, an attacker may be able to...

GO-2024-2617 Authentication bypass in github.com/hashicorp/vault

The TLS certificate authentication method incorrectly validates client certificates when configured with a non-CA certificate as a trusted certificate. When configured this way, attackers may be able to craft a certificate that can be used to bypass authentication...

CVE-2011-0228

Affected software: Apple iOS prior to 4.2.10 and 4.3.x prior to 4.3.5. Vulnerability: The Data Security component does not check the basicConstraints parameter when validating X.509 certificate chains, allowing a non-CA certificate to sign a certificate for any domain. This enables a man-in-the-m...

CVE-2011-0228

The Data Security component in Apple iOS before 4.2.10 and 4.3.x before 4.3.5 does not check the basicConstraints parameter during validation of X.509 certificate chains, which allows man-in-the-middle attackers to spoof an SSL server by using a non-CA certificate to sign a certificate for an...

CVE-2011-0228: Improper Input Validation

The Data Security component in Apple iOS before 4.2.10 and 4.3.x before 4.3.5 does not check the basicConstraints parameter during validation of X.509 certificate chains, which allows man-in-the-middle attackers to spoof an SSL server by using a non-CA certificate to sign a certificate for an...