Is CVE-2026-11999 actively exploited?

No active exploitation of CVE-2026-11999 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-11999 be exploited remotely?

Yes. CVE-2026-11999 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-11999?

CVE-2026-11999 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-11999

HIGH

CVE-2026-11999

CWE-295Published: June 25, 2026· Updated: Jun 26, 2026

7.5

CVSS v3.1

EPSS:0.19%probability of exploitation in 30 daysPercentile:9.2th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-11999 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.