CVE-2026-5507

Name: CVE-2026-5507
Creator: NVD / NIST
Published: 2026-04-09T23:17:01.543+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.1/10EPSS 0.17%

Last modified Jun 17, 2026

CVE-2026-5507 is a medium-severity vulnerability rated 4.1/10 on the CVSS scale. 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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4/10

CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H

CVSS 4.0

4.1/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.17%

6.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Wolfssl	Wolfssl	<= 5.9.0

References

https://github.com/wolfSSL/wolfssl/pull/10088Issue Tracking, Patch

Timeline

Published: Apr 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-5507?

How severe is CVE-2026-5507?

CVE-2026-5507 has a CVSS score of 4.1/10 (MEDIUM severity). The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.

How do I fix CVE-2026-5507?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-5507?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST