Is there a public exploit for CVE-2026-128026?

No public exploit for CVE-2026-128026 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-128026?

CVE-2026-128026 scores CVSS 6.9 (v4.0), rated medium.

What does CVE-2026-128026 affect?

CVE-2026-128026 affects PHP frankenphp.

6.9 Medium

FrankenPHP from 1.5.0 before 1.13.0 contains an incomplete environment sandbox vulnerability in which putenv writes to the process-wide OS…

CVE-2026-128026

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 procopen or exec can read secrets such as database passwords set by other requests.

Assessment

CVSS: 6.9 (v4.0)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 13 November 2026
Last updated: 13 November 2026
Affected: PHP · frankenphp
Assigner: VulnCheck

CVSS vectorCVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

At the source

EUVD (ENISA)

References

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