CVE-2026-4159 | THREATINT

Description

1-byte OOB heap read in wc_PKCS7_DecodeEnvelopedData via zero-length encrypted content. A vulnerability existed in wolfSSL 5.8.4 and earlier, where a 1-byte out-of-bounds heap read in wc_PKCS7_DecodeEnvelopedData could be triggered by a crafted CMS EnvelopedData message with zero-length encrypted content. Note that PKCS7 support is disabled by default.

PUBLISHED Reserved 2026-03-13 | Published 2026-03-19 | Updated 2026-03-20 | Assigner wolfSSL

LOW: 1.2CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Green

Problem types

CWE-125 Out-of-bounds read

Product status

Default status

unaffected

Any version before 5.9.0

affected

Credits

Haruto Kimura (Stella) finder

References

github.com/wolfSSL/wolfssl/pull/9945

cve.org (CVE-2026-4159)

nvd.nist.gov (CVE-2026-4159)

Download JSON