CVE-2026-5507 MEDIUM

CVE-2026-5507: Session Cache Restore — Arbitrary Free via Deserialized Pointer

Vendor Wolfssl
Product wolfSSL
Weakness CWE-502 · Unsafe deserialization
Published April 9, 2026
Last update April 14, 2026

CVSS base score

4.1/10
Attack vector Local
Attack complexity High
Privileges required High
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

When restoring a session from cache, a pointer from the serialized session data is used in a free operation without validation. An attacker who can poison the session cache could trigger an arbitrary free. Exploitation requires the ability to inject a crafted session into the cache and for the application to call specific session restore APIs.

Key dates

02Disclosure timeline

April 9, 2026 CVE published
April 14, 2026 Record updated