CVE-2026-128026

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 29/100
Published: 2026-11-13 Modified: 2026-11-13 First seen: 2026-11-13 Status: active

Attack Surface

No Interaction Conf. Impact

CVSS Vector Breakdown

AV: Local
AC: High
PR: Low
UI: None
S: X
AT: Present
VC: High
VI: Low
VA: None

Description

FrankenPHP from 1.5.0 before 1.13.0 contains an incomplete environment sandbox vulnerability in which putenv writes to the process-wide OS environment via os.Setenv, leaking values across concurrent requests. Attackers reaching a request path that spawns child processes with the default environment through proc_open or exec can read secrets such as database passwords set by other requests.

Affected Software (1)

VendorProductVersion
php frankenphp 1.5.0 < 1.13.0

Bug Bounty Relevance

29 / 100
✓ No user interaction

CVSS Score

6.9 / 10.0 v4.0
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/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 — Exploitation Probability

0.13%
Raw Score 0.001300
Percentile 2.7%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00130
2026-11-13
0.00130

Intelligence Sources

mitre ref →
nvd ref →