CVE-2026-5504

Summary

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.

Affected Software

VendorProductVersion RangeStatus
wolfSSLwolfSSL0 <= 5.9.0affected

Weaknesses

  • CWE-354: CWE-354 Improper validation of integrity check value

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References