PT-2026-52511 · Wolfssl · Wolfssl

Published 2026-06-25 · Updated 2026-06-25 · CVE-2026-11999

Mitre

CVSS v4.0

8.2

High

Base vector

AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

X.509 trust-chain bypass (path-depth exhaustion) in the OpenSSL compatibility certificate verifier (wolfSSL X509 verify cert()). This affects only builds with --enable-opensslextra whose application calls X509 verify cert() with caller-supplied untrusted intermediates; for those users it is critical, otherwise the library is unaffected. Native wolfSSL TLS/DTLS usage is not impacted. X509 verify cert() returned success based only on the last verified link rather than on reaching a trust anchor: when the supplied chain is deeper than the verifier's maximum path depth (default 100), path building runs out of depth while still walking untrusted intermediates and the chain is accepted even though it never reaches a configured trust anchor, allowing acceptance of an attacker-controlled certificate. The default TLS handshake (WOLFSSL VERIFY PEER) is not affected; only applications doing manual or deferred verification through this API are.

Fix

Improper Certificate Validation

Weakness Enumeration

CWE-295

Related Identifiers

CVE-2026-11999

Affected Products

Wolfssl

References · 3

• https://github.com/wolfSSL/wolfssl/pull/10674 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-11999 · Security Note
• https://wolfssl.com/docs/security-vulnerabilities · Note