CVE-2026-70557 diboot-core Authenticated Arbitrary Field Read via loadRelatedData Discloses Password Hashes and Salts
Authenticated users can read sensitive password hashes and salts via an unrestricted API endpoint, enabling offline cracking and administrative account takeover.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-70557?
CVE-2026-70557 is a high-severity vulnerability in diboot-core, published on 6 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-639
Which versions are affected by CVE-2026-70557?
How do I fix CVE-2026-70557?
No fix has been published for CVE-2026-70557 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-70557 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-70557 exists.
Sources
Also known as GHSA-5cj8-jrqq-crmv.