CVE-2026-82827 PUBLISHED

A hard-coded JWT signing secret key may allow administrative functions to be abused using fraudulently generated Bearer tokens

Assigner: Hitachi
Reserved: 31.08.2026 Published: 01.10.2026 Updated: 01.10.2026

Hitachi Coding Software Suite contains a vulnerability related to Use of Hard-coded Cryptographic Key. The Hardcoding of JWT signing secret key allows an attacker to generate unauthorized Bearer tokens and exploit administrative functions.

This issue affects Hitachi Coding Software Suite: through 3.3.0.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Hitachi Industrial Equipment Systems
Product	Hitachi Coding Software Suite
Versions	Default: unaffected affected from 0 to 3.3.0 (incl.)

Credits

Michael Heinzl finder

References

https://www.hitachi-ies.com/common/documents/vulnerability/hcss/Hitachi_Coding_Software_Suite_Public_statement_20260925_EN.pdf

Problem Types

CWE-321 Use of hard-coded cryptographic key CWE

Impacts

CAPEC-37 Retrieve Embedded Sensitive Data