CVE-2026-128015
FrankenPHP before 1.13.4 Use-After-Free via putenv() During Request Shutdown
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
FrankenPHP before 1.13.4 contains a use-after-free vulnerability that leaves a dangling pointer to a freed environment table when putenv() is called during request shutdown. Attackers triggering putenv() in shutdown functions, destructors, or session handlers can crash the process on the next getenv() call or leak previous request environment values.
| 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-rgpj-f2qx-xwhf github.com: https://github.com/php/frankenphp/commit/ab174aa6c27738b9ee56c97ac276d152bfb38f5e vulncheck.com: https://www.vulncheck.com/advisories/frankenphp-before-1.13.4-use-after-free-via-putenv-during-request-shutdown
Credits
🔍 atarus-security