# CVE-2026-77240: WACRM: Database-layer authorization bypasses

> Authenticated users can bypass row-level security to self-promote roles, access other tenants' data, or modify tenant resources in WACRM.

- **Severity:** Critical 9.9 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Sep 2026
- **Updated:** 23 Sep 2026
- **Also known as:** GHSA-fg5p-2qc3-jmxr

## What is CVE-2026-77240?

CVE-2026-77240 is a critical missing authorization vulnerability in ArnasDon wacrm, published on 18 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

WACRM is a self-hostable CRM template for WhatsApp. In version 0.7.0 and earlier, the profiles_update row-level security policy in supabase/migrations/017_account_sharing.sql permits authenticated users to modify their own account_role and account_id, allowing a viewer to self-promote or move into another tenant and then access or modify tenant resources. Separately, match_ai_knowledge_fts and match_ai_knowledge_semantic in supabase/migrations/030_ai_knowledge.sql run as SECURITY DEFINER, accept a caller-controlled p_account_id, and omit an is_account_member check, allowing an authenticated non-member to read another tenant's knowledge-base chunks. This vulnerability is fixed with commit e01f7ed37184f972ace8fb2da5c3e37e56a6050f.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-77240?


## How do I fix CVE-2026-77240?

No fix has been published for CVE-2026-77240 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-77240 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77240 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-77240 and fix it if it is affected.

What it is: CVE-2026-77240 is a critical missing authorization vulnerability in ArnasDon wacrm, published on 18 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77240 exists.

Affected product: ArnasDon wacrm. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-77240/ (Markdown: https://insights.sbomify.com/CVE-2026-77240/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-77240
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-77240
- OSV: https://osv.dev/vulnerability/CVE-2026-77240

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-77240/
Summaries are generated and may contain mistakes; the official description above is the record.