Unrated severityNVD Advisory· Published Jun 23, 2026

MCU Firmware Update Authentication Bypass on Caliptra Core

CVE-2026-5818

Description

Incorrect check of function return value in Caliptra Core Runtime Firmware (ActivateFirmwareCmd::activate_fw modules) allows bypass of Caliptra Core's verification of the MCU FW during a hitless update.

This issue affects Core Runtime Firmware: from 2.0.0 through 2.0.1, 2.1.0.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Chipsalliance/Caliptra Core Runtime Firmwarellm-create
Range: 2.0.0 - 2.0.1, 2.1.0

Patches

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

github.com/chipsalliance/caliptra-sw/security/advisories/GHSA-456r-gcjr-6rxqmitre

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