# CVE-2026-2099: Flowring｜AgentFlow - Stored Cross-Site Scripting

> Authenticated attackers can inject persistent JavaScript into AgentFlow, executing code in victims' browsers to potentially hijack sessions or steal data.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 10 Feb 2026
- **Updated:** 10 Feb 2026
- **Also known as:** GHSA-2743-qq2m-hpg2

## What is CVE-2026-2099?

CVE-2026-2099 is a medium-severity cross-site scripting vulnerability in Flowring AgentFlow, published on 10 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

AgentFlow developed by Flowring has a Stored Cross-Site Scripting vulnerability, allowing authenticated remote attackers to inject persistent JavaScript codes that are executed in users' browsers upon page load.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-2099?

It affects 1 product.


Products: Flowring Agentflow.

## How do I fix CVE-2026-2099?

No fix has been published for CVE-2026-2099 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-2099 being exploited?

There is no known exploitation of CVE-2026-2099 in the wild and no public exploit code.

## Other vulnerabilities in Flowring AgentFlow

- [CVE-2025-3709](https://insights.sbomify.com/CVE-2025-3709/): Flowring Technology Agentflow - Account Lockout Bypass (critical 9.8)
- [CVE-2022-39036](https://insights.sbomify.com/CVE-2022-39036/): FLOWRING Agentflow BPM - Arbitrary File Upload (critical 9.8)
- [CVE-2026-2095](https://insights.sbomify.com/CVE-2026-2095/): Flowring｜Agentflow - Authentication Bypass (critical 9.3)
- [CVE-2026-2096](https://insights.sbomify.com/CVE-2026-2096/): Flowring｜Agentflow - Missing Authenticaton (critical 9.3)
- [CVE-2022-39038](https://insights.sbomify.com/CVE-2022-39038/): FLOWRING Agentflow BPM - Broken Access Control (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-2099 and fix it if it is affected.

What it is: CVE-2026-2099 is a medium-severity cross-site scripting vulnerability in Flowring AgentFlow, published on 10 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-2099 in the wild and no public exploit code.

Affected product: Flowring AgentFlow. 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-2026-2099/ (Markdown: https://insights.sbomify.com/CVE-2026-2099/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-2099
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2099
- OSV: https://osv.dev/vulnerability/CVE-2026-2099

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-2099/
Summaries are generated and may contain mistakes; the official description above is the record.