This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-6091 →

DEBIAN-CVE-2026-6091

Partial-chain certificate verification may accept chains that terminate at a peer-supplied, untrusted intermediate certificate rather than a trusted a...

Original description

The description as published by the source.

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: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 wolfssl

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 wolfssl

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

References

advisory security-tracker.debian.org