PT-2026-31818 · Unknown · Phpsessionrestore

Seunghyun Yoon + 2 · Published 2026-04-09 · Updated 2026-04-30 · CVE-2026-5507

Positive Technologies (AI Summary)

CVSS v4.0

4.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions versions prior to 2.3

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.

Recommendations Update to version 2.3 or later.

Fix

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2026-5507

Affected Products

Phpsessionrestore

References · 11

• https://github.com/wolfSSL/wolfssl/pull/10088 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-5507 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-5507 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-5507 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-5507 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-5507 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-5507 · Security Note
• https://twitter.com/CVEnew/status/2042387944456273998 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2044075179328913678 · Twitter Post
• https://t.me/msrcreports/4082 · Telegram Post
• https://twitter.com/infoflowcloud/status/2042389941175325126 · Twitter Post