Is there a public exploit for CVE-2026-128020?

No public exploit for CVE-2026-128020 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-2026-128020?

CVE-2026-128020 scores CVSS 8.2 (v4.0), rated high.

What does CVE-2026-128020 affect?

CVE-2026-128020 affects PHP frankenphp.

8.2 High

FrankenPHP before 1.13.2 contains an uncontrolled recursion vulnerability in its PHP-to-Go array converter that fails to detect circular…

CVE-2026-128020

FrankenPHP before 1.13.2 contains an uncontrolled recursion vulnerability in its PHP-to-Go array converter that fails to detect circular references in PHP arrays. Passing a self-referential array to frankenphplog() or returning one from a worker callback triggers a fatal Go stack overflow, terminating the entire server process.

Assessment

CVSS: 8.2 (v4.0)
Severity: High
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:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

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