CVE-2025-11934

Improper input validation in the TLS 1.3 CertificateVerify signature algorithm negotiation in wolfSSL 5.8.2 and earlier on multiple platforms allows for downgrading the signature algorithm used. For example when a client sends ECDSA P521 as the supported signature algorithm the server previously could respond as ECDSA P256 being the accepted signature algorithm and the connection would continue with using ECDSA P256, if the client supports ECDSA P256.

CVSS v3 2.7 LOW

2.7^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/wolfSSL/wolfssl	Product
https://github.com/wolfSSL/wolfssl/pull/9113	Issue Tracking Patch
https://github.com/wolfSSL/wolfssl/pull/9113	Issue Tracking Patch

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*

OR	cpe:2.3:o:apple:macos:-:::::::*
	cpe:2.3:o:linux:linux_kernel:-:::::::*

History

03 Dec 2025, 18:47

Type	Values Removed	Values Added
First Time		Wolfssl wolfssl Linux Wolfssl Apple macos Apple Linux linux Kernel
References	~~() https://github.com/wolfSSL/wolfssl -~~	() https://github.com/wolfSSL/wolfssl - Product
References	~~() https://github.com/wolfSSL/wolfssl/pull/9113 -~~	() https://github.com/wolfSSL/wolfssl/pull/9113 - Issue Tracking, Patch
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 2.7
CPE		cpe:2.3:o:apple:macos:-:::::::* cpe:2.3:a:wolfssl:wolfssl:::::::: cpe:2.3:o:linux:linux_kernel:-:::::::*

24 Nov 2025, 18:15

Type	Values Removed	Values Added
References	~~() https://github.com/wolfSSL/wolfssl/pull/9113 -~~	() https://github.com/wolfSSL/wolfssl/pull/9113 -

21 Nov 2025, 23:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-11-21 23:15

Updated : 2025-12-03 18:47

NVD link : CVE-2025-11934

Mitre link : CVE-2025-11934

CVE.ORG link : CVE-2025-11934

JSON object : View

Products Affected

wolfssl

wolfssl

linux

linux_kernel

apple

macos

CWE

CWE-20

Improper Input Validation

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