# CVE-2026-23638: Kiteworks Secure Data Forms is vulnerable to Authorization Bypass Through User-Controlled Key

> An authenticated attacker can tamper with other users' form approval configurations due to insufficient authorization checks.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N`)
- **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:** 1 Jun 2026
- **Updated:** 1 Jun 2026

## What is CVE-2026-23638?

CVE-2026-23638 is a medium-severity missing authorization vulnerability in Accellion Kiteworks, published on 1 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Kiteworks is a private data network (PDN). Prior to version 9.3.0, an Insecure Direct Object Reference (IDOR) vulnerability in Kiteworks Secure Data Forms allows an authenticated attacker to tamper with the internal approval flow configurations of forms belonging to other users due to insufficient authorization checks on resource ownership. Upgrade Kiteworks to version 9.3.0 or later to receive a patch.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-23638?

It affects 1 product.


Products: Accellion Kiteworks.

## How do I fix CVE-2026-23638?

No fix has been published for CVE-2026-23638 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-23638 being exploited?

There is no known exploitation of CVE-2026-23638 in the wild and no public exploit code.

## Other vulnerabilities in Accellion Kiteworks

- [CVE-2026-102115](https://insights.sbomify.com/CVE-2026-102115/): Kiteworks Core Authentication Bypass in the Password Reset Workflow (critical 9.8)
- [CVE-2026-102149](https://insights.sbomify.com/CVE-2026-102149/): Kiteworks Email Protection Gateway Improper Access Control (critical 9.4)
- [CVE-2026-102147](https://insights.sbomify.com/CVE-2026-102147/): Kiteworks Core Administrative Account Takeover through Stored Cross-site Scripting (XSS) (critical 9.3)
- [CVE-2026-102095](https://insights.sbomify.com/CVE-2026-102095/): Kiteworks Email Protection Gateway server-side request forgery (critical 9.1)
- [CVE-2026-102102](https://insights.sbomify.com/CVE-2026-102102/): Kiteworks Email Protection Gateway server-side request forgery (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-23638 and fix it if it is affected.

What it is: CVE-2026-23638 is a medium-severity missing authorization vulnerability in Accellion Kiteworks, published on 1 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-23638 in the wild and no public exploit code.

Affected product: Accellion Kiteworks. 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-2026-23638/ (Markdown: https://insights.sbomify.com/CVE-2026-23638/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-23638
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-23638
- OSV: https://osv.dev/vulnerability/CVE-2026-23638

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-23638/
Summaries are generated and may contain mistakes; the official description above is the record.