# CVE-2026-82911: CSRF in Prospero Flow CRM order confirmation allows unauthorized order state changes

> An attacker can force authenticated users to confirm orders via a crafted link, allowing unauthorized state changes to pending orders.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 4 Sep 2026
- **Updated:** 4 Sep 2026
- **Also known as:** GHSA-4758-h5xr-5h97

## What is CVE-2026-82911?

CVE-2026-82911 is a medium-severity vulnerability in Roskus Prospero Flow CRM, published on 4 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Cross-Site Request Forgery (CSRF) in the OrderConfirmController at GET /order/confirm/{order_number} in Roskus Prospero Flow CRM before 5.15.11 allows an unauthenticated attacker to confirm any order on behalf of an authenticated user by directing them to a crafted page. Laravel's VerifyCsrfToken middleware enforces CSRF tokens only on POST, PUT, PATCH, and DELETE requests; the Route::get declaration leaves this state-changing action unprotected. Session cookies configured with SameSite=Lax are automatically included in top-level cross-site navigation, so a single link click triggers OrderConfirmController::confirm() and transitions the target order from pending to confirmed without user authorization. Because order numbers are sequential integers, an attacker can enumerate and confirm all existing orders in a single automated sweep.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2026-82911?


## How do I fix CVE-2026-82911?

No fix has been published for CVE-2026-82911 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-82911 being exploited?

There is no known exploitation of CVE-2026-82911 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-82911 and fix it if it is affected.

What it is: CVE-2026-82911 is a medium-severity vulnerability in Roskus Prospero Flow CRM, published on 4 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-82911 in the wild and no public exploit code.

Affected product: Roskus Prospero Flow CRM. 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-2026-82911/ (Markdown: https://insights.sbomify.com/CVE-2026-82911/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-82911
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-82911
- OSV: https://osv.dev/vulnerability/CVE-2026-82911

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-82911/
Summaries are generated and may contain mistakes; the official description above is the record.