CVE-2026-5504 — PKCS7 CBC Padding Oracle — Plaintext Recovery
A padding oracle exists in wolfSSL's PKCS7 CBC decryption that could allow an attacker to recover plaintext through repeated decryption queries with modified ciphertext. In prev…
Published: 2026-04-09 · CVSS: 6.3 · CVSS 4.0
A padding oracle exists in wolfSSL's PKCS7 CBC decryption that could allow an attacker to recover plaintext through repeated decryption queries with modified ciphertext. In previous versions of wolfSSL the interior padding bytes are not validated.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7