Signer Confusion Vulnerability in wolfSSL from wolfSSL
CVE-2026-7511

5.9MEDIUM

Key Information:

Vendor

Wolfssl

Status
Wolfssl
Vendor
CVE Published:
25 June 2026

What is CVE-2026-7511?

The vulnerability in wolfSSL involves a signer confusion issue related to the PKCS7_verify function, allowing attackers to exploit the mechanism by producing forged signatures. This occurs when the signer associated with a signature is not accurately bound, which can lead to the acceptance of falsified signatures, compromising the integrity of the security protocol.

Affected Version(s)

wolfSSL 3.15.5 <= 5.9.1

References

https://github.com/wolfSSL/wolfssl/pull/10203
patch
https://www.wolfssl.com/docs/security-vulnerabilities/

CVSS V4

Score:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Adjacent Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Nicholas Carlini from Anthropic
.