CVE-2026-5392 PUBLISHED

wolfSSL heap OOB read in PKCS7 SignedData streaming

Assigner: wolfSSL
Reserved: 01.04.2026 Published: 09.04.2026 Updated: 10.04.2026

Heap out-of-bounds read in PKCS7 parsing. A crafted PKCS7 message can trigger an OOB read on the heap. The missing bounds check is in the indefinite-length end-of-content verification loop in PKCS7_VerifySignedData().

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
CVSS Score: 2.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Adjacent	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	Present	Availability	Low	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	wolfSSL
Product	wolfSSL
Versions	Default: unaffected affected from 0 to 5.9.1 (excl.)

Credits

J Laratro (d0sf3t) finder

References

https://github.com/wolfssl/wolfssl/pull/10039

Problem Types

CWE-125 Out-of-bounds Read CWE