Production Debug-Unlock Token Verification Missing Device Binding

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-11836
StatePUBLISHED
AssignerCaliptra
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-04 00:16:40 UTC
Updated2026-08-04 20:16:48 UTC
DescriptionInsufficient verification of data authenticity in Caliptra Core ROM and Core Firmware (validate_debug_unlock_token()) in subsystem mode allows an attacker with access to the integrator's debug unlock signing service to unlock production debug on an unintended device by presenting a valid token issued for a different device sharing the same debug unlock key hash. The 384-bit challenge nonce continues to prevent replay of previously issued tokens. Practical impact is limited to loss of per-device scope enforcement within a set of devices that share the same unlock authority by design; it does not enable debug unlock on devices outside that set. This issue affects Core ROM: 2.0.0 through 2.0.2, 2.1.0 through 2.1.1; Core Firmware: 2.0.0 through 2.0.1, 2.1.0.

Risk And Classification

Primary CVSS: v4.0 1.8 LOW from b01ddd03-5ef6-483b-b2c5-acba77f1a554

CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.000800000 probability, percentile 0.002120000 (date 2026-08-04)

Problem Types: CWE-345 | CWE-345 CWE-345 Insufficient Verification of Data Authenticity

VersionSourceTypeScoreSeverityVector
4.0b01ddd03-5ef6-483b-b2c5-acba77f1a554Secondary1.8LOWCVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS1.8LOWCVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
High
User Interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Caliptra Core ROM affected 2.0.0 2.0.2 semver Not specified
CNA Caliptra Core ROM unaffected 2.0.3 semver Not specified
CNA Caliptra Core ROM affected 2.1.0 2.1.1 semver Not specified
CNA Caliptra Core ROM unaffected 2.1.2 semver Not specified
CNA Caliptra Core Firmware affected 2.0.0 2.0.1 semver Not specified
CNA Caliptra Core Firmware unaffected 2.0.2 semver Not specified
CNA Caliptra Core Firmware affected 2.1.0 semver Not specified
CNA Caliptra Core Firmware unaffected 2.1.1 semver Not specified

References

ReferenceSourceLinkTags
github.com/chipsalliance/caliptra-sw/security/advisories/GHSA-hw68-jjx4-... b01ddd03-5ef6-483b-b2c5-acba77f1a554 github.com
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