Vulnerability · Published Nov 21, 2025 · Assigned by wolfSSL
CVE-2025-11935Forward Secrecy Violation in WolfSSL TLS 1.3
Medium 6.3
In plain English
A medium-severity security flaw in wolfSSL from wolfSSL. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | wolfssl | 5.9.1-r0 | ALPINE-CVE-2025-11935 |
| Alpine:v3.24 | wolfssl | 5.8.4-r0 | ALPINE-CVE-2025-11935 |
| Debian:12 | wolfssl | no fix listed | DEBIAN-CVE-2025-11935 |
| Debian:13 | wolfssl | no fix listed | DEBIAN-CVE-2025-11935 |
| Ubuntu:22.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2025-11935 |
| Ubuntu:24.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2025-11935 |
| Ubuntu:25.10 | wolfssl | no fix listed | UBUNTU-CVE-2025-11935 |
| Ubuntu:26.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2025-11935 |
| Ubuntu:26.10 | wolfssl | no fix listed | UBUNTU-CVE-2025-11935 |
Affected products (as reported)
Weakness: CWE-326 · Vector: 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