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JLSEC-2026-732 Medium 6.3

A padding oracle exists in wolfSSL's PKCS7 CBC decryption that could allow an attacker to recover...

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JLSEC Published
Modified
Severity
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Affected Packages
wolfSSL_jll < 5.9.2+0
Upstream
CVE-2026-5504 GHSA-qvjw-73xm-jw34 EUVD-2026-21235

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.

References