# CVE-2026-82121: Origin Validation Error Vulnerability in HiRDB

Status: published. Published: 2026-10-27. Updated: 2026-11-04.

Origin Validation Error Vulnerability in HiRDB.


This issue affects HiRDB Server Version 10: from 10-00 before 10-12-01; HiRDB Server Version 9: from 09-00 through 09-66-22; HiRDB Server with Additional Function Version 9: from 09-00 through 09-66/V; HiRDB Server Version 9(32): from 09-02 through 09-66-22; HiRDB Server with Additional Function Version 9(32): from 09-00 through 09-66-/V.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Hitachi / HiRDB Server Version 10: ≥ 10-00; < 10-12-01 (affected, custom); unaffected at 10-12-01; unaffected at 10-11-02; unaffected at 10-08-05. Source: CNA: Hitachi
- Hitachi / HiRDB Server Version 9: ≥ 09-00; ≤ 09-66-22 (affected, custom). Source: CNA: Hitachi
- Hitachi / HiRDB Server with Additional Function Version 9: ≥ 09-00; ≤ 09-66/V (affected, custom). Source: CNA: Hitachi
- Hitachi / HiRDB Server Version 9(32): ≥ 09-02; ≤ 09-66-22 (affected, custom). Source: CNA: Hitachi
- Hitachi / HiRDB Server with Additional Function Version 9(32): ≥ 09-00; ≤ 09-66-/V (affected, custom). Source: CNA: Hitachi

## Severity and prioritization

- CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N; source: CNA: Hitachi

- CISA KEV: No listing in collected sources

- EPSS: 0.21% as of 2026-11-04; percentile 10.63%

- SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-346

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-145/index.html (CNA: Hitachi; vendor-advisory)

## Provenance

- CNA: Hitachi: https://www.cve.org/CVERecord?id=CVE-2026-82121; retrieved 2026-11-04; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-82121; retrieved 2026-11-04; source updated Not reported

Revision: 27be292094f39bce9e7a87d33e5b4e782963a55d9add8e435051af80eb5a456f

Canonical: https://y2.dev/cve/CVE-2026-82121

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.