CVE-2026-128015

8.3 HIGH 0.5% exploit odds Fix listed Memory safety Web app

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of service disruption.
Exploit odds: 0.5% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-11-12 20:32 UTC ReservedThe CVE id was reserved by its CNA
2026-11-13 10:18 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-11-13 10:18 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.5% in the next 30 days (EPSS).
Severity: 8.3 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2026-11-13 10:18 UTC
Last modified: 2026-11-13 10:18 UTC
Exploit probability: 0.5% · EPSS, next 30 days
Weakness: CWE-416 · Use after free
Record status: Deferred

Attack profile CVSS 4.0 · 8.3

Attack vector: Network
Complexity: High
Attack requirements: Present
Privileges needed: None
User interaction: None
Confidentiality: Low
Integrity: None
Availability: High

Raw vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-128015.md and follow it. Check whether this project is affected by CVE-2026-128015. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record