CVE-2026-128026 json
FrankenPHP 1.5.0 before 1.13.0 Cross-Request Environment Leakage via putenv
published last mo. modified 2d ago also EUVD-2026-125076 , GHSA-996f-w38m-f574
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository php/frankenphp. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 2%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- php frankenphp 1.13.0
Is CVE-2026-128026 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-14).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | 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 |
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N |
| CNA | 4.0 | 6.9 | 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 |
| NVD | 3.1 | 6.4 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N |
Affected products
- php frankenphp
Classification
- Weakness
-
- CWE-488 Exposure of Data Element to Wrong Session
References
-
github.com
/php/frankenphp/security/advisories/GHSA-996f-w38m-f574
vendor-advisory, advisory
-
vulncheck.com
/advisories/frankenphp-1.5.0-before-1.13.0-cross-request-environment-leakage-via-putenv
third-party-advisory
Sources
- CVE List CVE-2026-128026
- NVD CVE-2026-128026
- Maintainer advisory GHSA-996f-w38m-f574
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of php/frankenphp published their own advisory on GitHub. Reviewed sources take precedence over it.