CVE-2026-128016
FrankenPHP before 1.13.4 Use-After-Free of SplTempFileObject Streams in Worker Mode
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
FrankenPHP before 1.13.4 contains a use-after-free vulnerability in worker mode that frees internal streams of SplTempFileObject or SplFileObject on php://temp instances surviving across requests. Remote clients can send requests reaching code that uses such persisted objects, causing reads of freed memory that leak garbage data or crash the process.
| CWE | CWE-416 |
| Vendor | php |
| Product | frankenphp |
| Ecosystems | |
| Industries | Technology |
| Published | Nov 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Affected Versions
php / frankenphp
0 < 1.13.4
References
github.com: https://github.com/php/frankenphp/security/advisories/GHSA-cm3q-jw2q-9rh5 github.com: https://github.com/php/frankenphp/commit/837b76880b33a1a78ae4f27dea85bdcddb6cf70c vulncheck.com: https://www.vulncheck.com/advisories/frankenphp-before-1.13.4-use-after-free-of-spltempfileobject-streams-in-worker-mode
Credits
🔍 atarus-security