# CVE-2026-86405: Payment Validation Bypass in Sipay Electronic Money's SanalPos PrestaShop

> Attackers can bypass payment validation by spoofing cryptographic signatures in the Sipay PrestaShop module, allowing unauthorized transactions.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Oct 2026
- **Updated:** 12 Oct 2026
- **Also known as:** GHSA-7px9-f7pg-h379

## What is CVE-2026-86405?

CVE-2026-86405 is a critical vulnerability in Sipay Electronic Money and Payment Services Inc. PrestaShop Virtual POS Module, published on 9 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Improper verification of cryptographic signature vulnerability in Sipay Electronic Money and Payment Services Inc. PrestaShop Virtual POS Module allows Signature Spoofing by Improper Validation.

This issue affects PrestaShop Virtual POS Module: from 26.8.1 before 26.9.1.

Weakness: CWE-347 (Improper Verification of Cryptographic Signature)

## Which versions are affected by CVE-2026-86405?


## How do I fix CVE-2026-86405?

No fix has been published for CVE-2026-86405 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-86405 being exploited?

There is no known exploitation of CVE-2026-86405 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-86405 and fix it if it is affected.

What it is: CVE-2026-86405 is a critical vulnerability in Sipay Electronic Money and Payment Services Inc. PrestaShop Virtual POS Module, published on 9 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-86405 in the wild and no public exploit code.

Affected product: Sipay Electronic Money and Payment Services Inc. PrestaShop Virtual POS Module. 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-2026-86405/ (Markdown: https://insights.sbomify.com/CVE-2026-86405/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-86405
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-86405
- OSV: https://osv.dev/vulnerability/CVE-2026-86405

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-86405/
Summaries are generated and may contain mistakes; the official description above is the record.