CVE-2025-11934
Improper Validation of Signature Algorithm Used in TLS 1.3 CertificateVerify
Description
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.
INFO
Published Date :
Nov. 21, 2025, 10:12 p.m.
Last Modified :
Nov. 21, 2025, 10:12 p.m.
Remotely Exploit :
Yes !
Source :
wolfSSL
Affected Products
The following products are affected by CVE-2025-11934
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | LOW | 50d2cd11-d01a-48ed-9441-5bfce9d63b27 |
Solution
- Update wolfSSL to a version that addresses the TLS 1.3 vulnerability.
- Ensure signature algorithm negotiation is properly validated.
- Apply vendor-provided security patches.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-11934 vulnerability anywhere in the article.