CVE Watch24 jul 2026

CVE-2026-34610

The leancrypto library is a cryptographic library that exclusively contains only PQC-resistant cryptographic algorithms. Prior to version 1.

CVSS

5.9

Medio

EPSS

0.2%

KEV

—

Exploit Today

0-100

Publicado: 2 abr 2026 · Última mod.: 24 jul 2026 · CWE-681

EPSS · 30d

0.2%EPSS · 30 días0.2%

2026-07-042026-07-31

Descripción técnica

The leancrypto library is a cryptographic library that exclusively contains only PQC-resistant cryptographic algorithms. Prior to version 1.7.1, lc_x509_extract_name_segment() casts size_t vlen to uint8_t when storing the Common Name (CN) length. An attacker who crafts a certificate with CN = victim's CN + 256 bytes padding gets cn_size = (uint8_t)(256 + N) = N, where N is the victim's CN length. The first N bytes of the attacker's CN are the victim's identity. After parsing, the attacker's certificate has an identical CN to the victim's — enabling identity impersonation in PKCS#7 verification, certificate chain matching, and code signing. This issue has been patched in version 1.7.1.

Referencias oficiales

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