1. Home
  2. CVE Database
  3. CVE-2026-5507
MEDIUM · 4.0

CVE-2026-5507

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 ...

Vulnerability Description

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.

CVSS Score

4.0

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
WolfsslWolfssl<= 5.9.0

Related Weaknesses (CWE)

CWE-502

References

FAQ

What is CVE-2026-5507?

CVE-2026-5507 is a vulnerability with a CVSS score of 4.0 (MEDIUM). 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 ...

How severe is CVE-2026-5507?

CVE-2026-5507 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-5507?

Check the references section above for vendor advisories and patch information. Affected products include: Wolfssl Wolfssl.