# CVE-2026-42952: Hydro-Québec Le Circuit Electrique charging station backend Improper Restriction of Excessive Authentication Attempts

> Attackers can cause denial of service against Hydro-Québec charging stations by exploiting the lack of authentication attempt throttling.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/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:** Not needed
- **Fix available:** No
- **Published:** 10 Jul 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-88vc-rc72-29f3

## What is CVE-2026-42952?

CVE-2026-42952 is a high-severity denial of service vulnerability in Hydro-Québec Le Circuit Electrique charging station backend, published on 10 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Previously, there was no throttling on repeated authentication attempts 
to the charging station backend, which could allow an attacker to 
execute a denial-of-service attack.

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2026-42952?


## How do I fix CVE-2026-42952?

No fix has been published for CVE-2026-42952 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-42952 being exploited?

There is no known exploitation of CVE-2026-42952 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-42952 and fix it if it is affected.

What it is: CVE-2026-42952 is a high-severity denial of service vulnerability in Hydro-Québec Le Circuit Electrique charging station backend, published on 10 Jul 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-2026-42952 in the wild and no public exploit code.

Affected product: Hydro-Québec Le Circuit Electrique charging station backend. 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-2026-42952/ (Markdown: https://insights.sbomify.com/CVE-2026-42952/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-42952
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-42952
- OSV: https://osv.dev/vulnerability/CVE-2026-42952

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-42952/
Summaries are generated and may contain mistakes; the official description above is the record.