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Low severity3.3NVD Advisory· Published Mar 19, 2026· Updated Apr 29, 2026

CVE-2026-4159

CVE-2026-4159

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.

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Affected products

2
  • WolfSSL/Wolfssl2 versions
    cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*range: <5.9.0
    • (no CPE)range: <=5.8.4

Patches

Vulnerability mechanics

References

1

News mentions

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