CVE-2025-11935
Forward Secrecy Violation in WolfSSL TLS 1.3
- State
- Published
- Severity
- 6.3 Medium
- Published
- Nov 21, 2025
- Updated
- Dec 8, 2025
- Reserved
- Oct 17, 2025
Description
With TLS 1.3 pre-shared key (PSK) a malicious or faulty server could ignore the request for PFS (perfect forward secrecy) and the client would continue on with the connection using PSK without PFS. This happened when a server responded to a ClientHello containing psk_dhe_ke without a key_share extension. The re-use of an authenticated PSK connection that on the clients side unexpectedly did not have PFS, reduces the security of the connection.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N | wolfSSL |
Weaknesses
- CWE-326 Inadequate Encryption Strength
Affected Products
| Product | Versions |
|---|---|
wolfSSLwolfSSL |
|
References
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