CVE-2026-6091— Partial-chain verification accepts untrusted intermediate as trust anchor
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-6091
Vulnerability Information
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Vulnerability Title
Partial-chain verification accepts untrusted intermediate as trust anchor
Source: NVD (National Vulnerability Database)
Vulnerability Description
Partial-chain certificate verification may accept chains that terminate at a peer-supplied, untrusted intermediate certificate rather than a trusted anchor. An attacker could present a chain that ends at an intermediate they control and have it accepted as valid. This affects the OpenSSL compatibility certificate-path-building path (wolfSSL_X509_verify_cert / X509_STORE, OPENSSL_EXTRA) when the X509_V_FLAG_PARTIAL_CHAIN verify flag is enabled.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
证书验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
wolfSSL 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
wolfSSL是wolfSSL公司开源的一个针对嵌入式系统开发人员使用的小的、可移植的嵌入式SSL编程库。 wolfSSL存在加密问题漏洞，该漏洞源于部分链证书验证可能接受终止于对等方提供、不受信任的中间证书的链，而不是可信锚，导致攻击者可能提交以他们控制的中间证书结尾的证书链并被接受为有效。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-6091
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Patches & Fixes for CVE-2026-6091 (1)
Vendor Pages for CVE-2026-6091 (1)
Same Patch Batch · wolfSSL · 2026-06-25 · 32 CVEs total
| CVE-2026-6329 | PKCS#12 MAC verification uses attacker-controlled comparison length | |
| CVE-2026-55958 | Renesas TSIP TLS 1.3 transcript buffer out-of-bounds write in tsip_StoreMessage | |
| CVE-2026-55960 | Un-negotiated Raw Public Key (RFC 7250) accepted in place of X.509, bypassing chain valida | |
| CVE-2026-55967 | AES-GCM streaming APIs do not reject >64 GiB cumulative single messages, enabling counter | |
| CVE-2026-55961 | wolfSSL_PKCS7_verify() reports success for degenerate (certs-only) PKCS#7 with no signer | |
| CVE-2026-55962 | TLS 1.3 post-handshake authentication: server accepts Finished without client Certificate/ | |
| CVE-2026-55964 | Chain intermediate CA:TRUE without keyCertSign accepted as a signing CA (temporary CA exem | |
| CVE-2026-8720 | HMAC-BLAKE2 final discards message when key length exceeds block size | |
| CVE-2026-12340 | Out-of-bounds heap read in SM2/SM3 certificate Subject Key Identifier computation | |
| CVE-2026-10512 | X25519 x86_64 assembly final reduction leaves non-canonical field element | |
| CVE-2026-10097 | ML-KEM-1024 x64 AVX2 incomplete cipher text comparison enables IND-CCA2 break and static p | |
| CVE-2026-10098 | OCSP CertID serial-number length-confusion in wolfSSL_OCSP_resp_find_status | |
| CVE-2026-10592 | Wildcard DNS SAN bypasses CA name-constraint checks | |
| CVE-2026-11310 | X.509 trust-chain bypass in wolfSSL_X509_verify_cert() via untrusted intermediate anchorin | |
| CVE-2026-11703 | Missing SNI/ALPN binding on stateful (session-ID) TLS session resumption | |
| CVE-2026-11999 | X.509 trust-chain bypass via path-depth exhaustion in wolfSSL_X509_verify_cert() | |
| CVE-2026-7532 | iPAddress name constraints not enforced when WOLFSSL_IP_ALT_NAME is undefined | |
| CVE-2026-6679 | DTLS 1.3 ACK serialization heap buffer overflow via integer truncation | |
| CVE-2026-6094 | Heap buffer overread in wc_PKCS7_DecodeEnvelopedData parsing crafted PKCS7 EnvelopedData | |
| CVE-2026-6731 | X.509 name constraint bypass via Subject CN treated as a DNS name |
Showing top 20 of 32 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: wolfSSL
- CVE-2026-7511
PKCS7_verify signer confusion allows forged signatures to be - CVE-2026-7532
iPAddress name constraints not enforced when WOLFSSL_IP_ALT_ - CVE-2026-8720
HMAC-BLAKE2 final discards message when key length exceeds b - CVE-2026-10098
OCSP CertID serial-number length-confusion in wolfSSL_OCSP_r - CVE-2026-11703
Missing SNI/ALPN binding on stateful (session-ID) TLS sessio
Same vendor: wolfSSL
- CVE-2026-7511
PKCS7_verify signer confusion allows forged signatures to be - CVE-2026-7532
iPAddress name constraints not enforced when WOLFSSL_IP_ALT_ - CVE-2026-8720
HMAC-BLAKE2 final discards message when key length exceeds b - CVE-2026-10098
OCSP CertID serial-number length-confusion in wolfSSL_OCSP_r - CVE-2026-11703
Missing SNI/ALPN binding on stateful (session-ID) TLS sessio
Same weakness: CWE-295
- CVE-2026-8480
Connection possible to the Administration portal with a revo - CVE-2026-12374
Improper XPC caller certificate validation and TOCTOU race c - CVE-2026-7532
iPAddress name constraints not enforced when WOLFSSL_IP_ALT_ - CVE-2026-10098
OCSP CertID serial-number length-confusion in wolfSSL_OCSP_r - CVE-2026-6450
CRL critical extension bypass in ParseCRL_Extensions
V. Comments for CVE-2026-6091
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