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CVE-2026-11836

Production Debug-Unlock Token Verification Missing Device Binding

LOW
1.8
CVSS Score
Published: August 4, 2026 at 12:02 AM UTC
Updated: September 3, 2026 at 04:54 PM UTC
2 products affected across 1 vendorCore ROMCore Firmware

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Severity
LOW1.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

Insufficient 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Core Firmware· Caliptra
60%
2.0.0 ≤ v ≤ 2.0.12.0.02.1.0
Vendor states this is fixed in 2.0.2 (unaffected)
Vendor states this is fixed in 2.1.1 (unaffected)
Core ROM· Caliptra
60%
2.0.0 ≤ v ≤ 2.0.22.1.0 ≤ v ≤ 2.1.12.0.02.1.0
Vendor states this is fixed in 2.0.3 (unaffected)
Vendor states this is fixed in 2.1.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://github.com/chipsalliance/caliptra-sw/security/advisories/GHSA-hw68-jjx4-m376

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

1.8LOWCaliptra
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-345

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