CVE-2026-5818: CWE-253 Incorrect check of function return value in Caliptra Core Runtime Firmware
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.
CVE-2026-5818: CWE-253 Incorrect check of function return value in Caliptra Core Runtime Firmware
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.
CVSS v4.0
Score 7.2high
Affected software
pkg:github/Core Runtime FirmwareRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Caliptra
- Date Reserved
- 2026-04-08T15:45:10.928Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3b23adeed863c81ed4a4b2
Added to database: 06/24/2026, 00:24:13 UTC
Last updated: 06/24/2026, 00:24:13 UTC
Views: 1
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