CVE-2026-11836

Production debug unlock via missing device binding

Published Aug 4, 2026 · Updated Aug 4, 2026

Authentication bypass in Caliptra Core ROM and Core Firmware allows local users to unlock production debug on an unintended device. The validate_debug_unlock_token() path verifies the signature and nonce but does not compare the token's signed UDI with the target device's UDI. Exploitation requires subsystem mode and access to the integrator's signing service for a shared key hash, limiting impact to devices under that authority.

CVSS severity1.8
Low
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Caliptra Core ROM and Core Firmware allows local users to unlock production debug on an unintended device. The validate_debug_unlock_token() path verifies the signature and nonce but does not compare the token's signed UDI with the target device's UDI. Exploitation requires subsystem mode and access to the integrator's signing service for a shared key hash, limiting impact to devices under that authority.

The record

CVE
CVE-2026-11836
Published
Aug 4, 2026
Updated
Aug 4, 2026
Vendor
Caliptra
Product
Core ROM
Classifications
CWE-345, CAPEC-115
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0.0 <=2.0.2
  2. Affected versionversion=2.1.0 <=2.1.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Caliptra · Core ROMversion=2.0.0 <=2.0.2; version=2.1.0 <=2.1.1
Caliptra · Core Firmwareversion=2.0.0 <=2.0.1; version=2.1.0

Published CVSS scores

1.8CaliptraCVSS: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 describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity
CAPEC-115Authentication Bypass

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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