CVE-2026-4159

LOW EPSS 0.8%
Published Mar 19, 20263mo ago · Modified Jun 17, 20262w ago
1.2 CVSS 4.0
Low
Find Similar
Published Mar 19, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
1.2
Exploitability
—
Impact
—
Vector string
CVSS: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/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:Green
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
0.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 1

VendorProductVersionRange
wolfsslwolfssl* <5.9.0

References 1

  • github.com https://github.com/wolfSSL/wolfssl/pull/9945
    Issue TrackingPatch

Remediation

  • github.com https://github.com/wolfSSL/wolfssl/pull/9945
    Issue TrackingPatch