# CVE-2026-23513: FOSSBilling: Broken Authorization in Client Transaction and Order Listings

> Authenticated clients can bypass tenant scoping to retrieve other clients' transaction and order data due to flawed SQL query construction.

- **Severity:** High 7.1 (`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`)
- **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:** 23 Jun 2026
- **Updated:** 26 Jun 2026
- **Also known as:** GHSA-xcrv-cccw-r65v

## What is CVE-2026-23513?

CVE-2026-23513 is a high-severity missing authorization vulnerability in FOSSBilling, published on 23 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

FOSSBilling is a free, open-source billing and client management system. In versions 0.7.2 and prior, a query-construction flaw in client list endpoints allowed authenticated clients to bypass tenant scoping and retrieve other clients’ data. Details
In ServiceTransaction::getSearchQuery() and Order\Service::getSearchQuery(), OR-based search/action filters were appended without grouping, allowing SQL operator precedence to evaluate OR clauses independently of the enforced client_id constraint. Crafted requests could therefore return records and metadata belonging to other clients, including identifiers, amounts, status, timestamps, and related fields. This issue was fixed in version 0.8.0.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-23513?


## How do I fix CVE-2026-23513?

No fix has been published for CVE-2026-23513 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-23513 being exploited?

There is no known exploitation of CVE-2026-23513 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-23513 and fix it if it is affected.

What it is: CVE-2026-23513 is a high-severity missing authorization vulnerability in FOSSBilling, published on 23 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-23513 in the wild and no public exploit code.

Affected product: FOSSBilling. 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-2026-23513/ (Markdown: https://insights.sbomify.com/CVE-2026-23513/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-23513
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-23513
- OSV: https://osv.dev/vulnerability/CVE-2026-23513

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-23513/
Summaries are generated and may contain mistakes; the official description above is the record.