# CVE-2026-5031: BichitroGan ISP Billing Software Endpoint users-view resource injection

> Remote attackers can manipulate the ID argument in the users-view endpoint to access or modify unauthorized resources due to improper control of resource identifiers.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P`)
- **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:** 29 Mar 2026
- **Updated:** 1 Apr 2026
- **Also known as:** GHSA-88jg-87gj-m92c

## What is CVE-2026-5031?

CVE-2026-5031 is a medium-severity path traversal vulnerability in BichitroGan ISP Billing Software, published on 29 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was found in BichitroGan ISP Billing Software 2025.3.20. Impacted is an unknown function of the file /?_route=settings/users-view/ of the component Endpoint. The manipulation of the argument ID results in improper control of resource identifiers. The attack can be launched remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-99 (Improper Control of Resource Identifiers)

## Which versions are affected by CVE-2026-5031?


## How do I fix CVE-2026-5031?

No fix has been published for CVE-2026-5031 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-5031 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5031 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-5031 and fix it if it is affected.

What it is: CVE-2026-5031 is a medium-severity path traversal vulnerability in BichitroGan ISP Billing Software, published on 29 Mar 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-2026-5031 exists.

Affected product: BichitroGan ISP Billing Software. 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-2026-5031/ (Markdown: https://insights.sbomify.com/CVE-2026-5031/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-5031
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5031
- OSV: https://osv.dev/vulnerability/CVE-2026-5031

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-5031/
Summaries are generated and may contain mistakes; the official description above is the record.