backpack/crud security advisory

CVE-2026-57570: Laravel Backpack CRUD: HasMany/MorphMany relation fields allow cross-tenant record re-parenting (IDOR) via attachManyRelation

CVE-2026-57570 is a medium-severity missing authorization vulnerability in the PHP package backpack/crud (CVSS 6.5), published 14 September 2026. It is fixed in 6.8.15 and 7.0.47, one per release line; earlier versions on each line are affected. Exploiting it needs a low-privilege user account.

medium 6.5 published 2026-09-14 · updated 2026-09-30

Affected versions: >= 6.0.0, < 6.8.15
>= 7.0.0, < 7.0.47
Fixed in: 6.8.15, 7.0.47
Newest release: 7.1.24
Severity: Medium · CVSS 6.5
Type: Missing authorization check
CWE-862
Exploited in the wild: Not on the CISA KEV list
checked 2026-11-04

Is your backpack/crud version affected?

Run composer show backpack/crud in your project, then enter the version. We check it against this and every other known backpack/crud advisory.

Who can exploit CVE-2026-57570

Access: A normal, low-privilege user account in the app.

CVSS vector (scored by GitHub): CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Your app is only exposed if it uses the affected part of backpack/crud. The advisory below says which part that is. If you are not sure, upgrade anyway: it costs less than finding out.

How to fix CVE-2026-57570 in backpack/crud

Find the installed version: composer show backpack/crud. If you never required it yourself, composer why backpack/crud shows which package pulls it in.
Update it: composer update backpack/crud --with-all-dependencies. You need the fixed version for your release line (6.8.15 and 7.0.47).
If Composer will not go that high, your composer.json constraint is holding it back. Widen it (for example "backpack/crud": "^7.0.47" if you can take that version), or upgrade the package that requires it.
Run composer audit. It reads the same advisory data and should no longer list CVE-2026-57570.
Commit composer.lock and deploy it. On the server, run composer install --no-dev from the lock file, not composer update.

If you cannot upgrade yet

General hardening for missing authorization issues while the upgrade waits. None of it replaces the fix.

Remove accounts you do not need and review what each role can do.
Put the admin area behind a VPN, IP allow-list or extra login until you upgrade.
If your app does not use the affected feature, note that in your audit, but still plan the upgrade.

The CVE-2026-57570 advisory

backpack/crud provides Create, Read, Update & Delete (CRUD) functions for Backpack, a collection of Laravel packages that help users build custom administration panels. From 6.0.0 until 6.8.15 and 7.0.47, HasMany and MorphMany handling through attachManyRelation during CRUD create and update operations accepts submitted child primary keys without consistently restricting updates to records belonging to the current parent or permitted by the developer-defined relation scope. An authenticated low-privilege administrator who can edit a parent form exposing an affected multiple-relation field can cause unrelated child records to be reassigned, detached, nulled, or deleted across ownership or tenant boundaries. Exploitation requires related records that should not be attachable or removable by that administrator and the absence of additional application-level authorization around submitted relation values. This issue is distinct from earlier direct main-entity CRUD scoping fixes because it affects secondary models modified by relationship-saving logic. This issue is fixed in versions 6.8.15 and 7.0.47.

Description from the CVE record, published by GitHub (the CVE Numbering Authority), via the NVD entry for CVE-2026-57570. Advisory title: “Laravel Backpack CRUD: HasMany/MorphMany relation fields allow cross-tenant record re-parenting (IDOR) via attachManyRelation”.

References

GitHub advisory GHSA-42vx-43vc-x6pr github.com
Fix commit 045ac00 github.com
Fix commit 24cfd2f github.com
Pull request #6021 github.com
Pull request #6022 github.com
Release 6.8.15 github.com
Release 7.0.47 github.com

Other backpack/crud advisories

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Where this data comes from

Affected and fixed versions: the Packagist security advisories API (GitHub Advisory Database and FriendsOfPHP), the same data composer audit uses. Synced 2026-11-03.
Description, score, weakness and references: NIST National Vulnerability Database (NVD), checked 2026-11-04. This product uses data from the NVD API but is not endorsed or certified by the NVD.
Exploited-in-the-wild status: the CISA Known Exploited Vulnerabilities catalog, checked 2026-11-04.
Compiled by Daniel Lasek at Laskyr from the sources above. The summary, “who can exploit it”, “how to fix it” and hardening sections are our plain-English reading of the record and are generated from it. The quoted description is the record's own text. Spot an error? Tell us.