# CVE-2026-70557: diboot-core Authenticated Arbitrary Field Read via loadRelatedData Discloses Password Hashes and Salts

Status: published. Published: 2026-08-06. Updated: 2026-11-08.

diboot-core's POST /common/load-related-data endpoint resolves caller-supplied field names to any @TableField column of any entity and returns those values for all rows, with no field or entity allowlist. The only guard, relatedDataSecurityCheck(), returns true unconditionally, so any authenticated user (including a zero-role account) can read @JsonIgnore-annotated secret fields such as IamAccount.authSecret and IamAccount.secretSalt for every account, or arbitrary secret fields of any other entity. Shiro's two-iteration MD5 with an 8-character salt is trivially crackable offline, so the disclosed admin password hashes convert to full administrative takeover. The endpoint is not example code; the official diboot-admin-ui frontend requires it, so deployments following the vendor's recommended integration expose it. The mechanism was renamed relatedData* to attachMore* on the development branch, but attachMoreSecurityCheck() also returns true unconditionally.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- diboot / diboot-core: ≥ 0; ≤ 3.9.0 (affected, custom). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N; source: CNA: VulnCheck

- CVSS 4.0: 7.1 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 0.39% as of 2026-11-08; percentile 32.84%

- SSVC: exploitation poc; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-639

## Exploit evidence

- exploit: https://github.com/dibo-software/diboot/issues/104 (ADP: CISA-ADP)

## References

- https://github.com/dibo-software/diboot (CNA: VulnCheck; product)

- https://github.com/dibo-software/diboot/issues/104 (CNA: VulnCheck; technical-description, issue-tracking)

- https://github.com/dibo-software/diboot/issues/104 (ADP: CISA-ADP; exploit)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-70557; retrieved 2026-11-08; source updated 2026-11-08

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-70557; retrieved 2026-11-08; source updated Not reported

Revision: 6ecd952c72aea234d53789b571bab7f96ec65dc3f27318fb8acd6061448f3ebf

Canonical: https://y2.dev/cve/CVE-2026-70557

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