How severe is CVE-2026-105857?

CVE-2026-105857 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-105857 being actively exploited?

It is not currently listed in CISA's Known Exploited Vulnerabilities catalog, and no EPSS exploit-prediction score is available yet.

How do I fix CVE-2026-105857?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2026-105857 published?

CVE-2026-105857 was published on 2026-10-06.

CVE-2026-105857

CVE-2026-105857 is a critical-severity vulnerability with a CVSS 3.x base score of 10.0. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Published: 2026-10-06
Last modified: 2026-10-06

Description

Payload is a free and open source headless content management system. In @payloadcms/plugin-form-builder versions before 3.90.0 and canary versions before 4.0.0-canary.34, an attacker can craft a form submission that executes code remotely on the server. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

Frequently asked questions

What is CVE-2026-105857?: Payload is a free and open source headless content management system. In @payloadcms/plugin-form-builder versions before 3.90.0 and canary versions before 4.0.0-canary.34, an attacker can craft a form submission that executes code remotely on the server. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.
How severe is CVE-2026-105857?: CVE-2026-105857 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-105857 being actively exploited?: It is not currently listed in CISA's Known Exploited Vulnerabilities catalog, and no EPSS exploit-prediction score is available yet.
How do I fix CVE-2026-105857?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-105857 published?: CVE-2026-105857 was published on 2026-10-06.

References

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