# CVE-2026-33585: Arqit SKA-Platform Improper Handling of Parameters Vulnerability

> Attackers can impersonate authenticated users via unexpired sessions due to improper idle timeout handling in the Keycloak interface.

- **Severity:** Low 3.8 (`CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 13 May 2026
- **Updated:** 13 May 2026
- **Also known as:** GHSA-3878-8q4v-56w7

## What is CVE-2026-33585?

CVE-2026-33585 is a low-severity authentication bypass vulnerability in Arqit Symmetric Key Agreement Platform, published on 13 May 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Improper management of the idle timeout parameter in the Keycloak interface of the Arqit SKA-Platform enables an attacker to impersonate an authenticated tenant user via an unexpired browser session.

This issue affects Symmetric Key Agreement Platform: before 26.03.

Weakness: CWE-233 (Improper Handling of Parameters)

## Which versions are affected by CVE-2026-33585?


## How do I fix CVE-2026-33585?

No fix has been published for CVE-2026-33585 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-33585 being exploited?

There is no known exploitation of CVE-2026-33585 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-33585 and fix it if it is affected.

What it is: CVE-2026-33585 is a low-severity authentication bypass vulnerability in Arqit Symmetric Key Agreement Platform, published on 13 May 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-33585 in the wild and no public exploit code.

Affected product: Arqit Symmetric Key Agreement Platform. 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-2026-33585/ (Markdown: https://insights.sbomify.com/CVE-2026-33585/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-33585
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-33585
- OSV: https://osv.dev/vulnerability/CVE-2026-33585

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-33585/
Summaries are generated and may contain mistakes; the official description above is the record.