# CVE-2026-90710: taisan tarzan-cms Theme Download Function ThemeService.java openConnection server-side request forgery

> Remote attackers can exploit a server-side request forgery vulnerability in the theme download function to access internal resources.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Sep 2026
- **Updated:** 16 Sep 2026
- **Also known as:** GHSA-v8rq-g678-pm22

## What is CVE-2026-90710?

CVE-2026-90710 is a medium-severity server-side request forgery vulnerability in taisan tarzan-cms, published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was determined in taisan tarzan-cms 1.0.0. This issue affects the function openConnection of the file com/tarzan/cms/modules/admin/service/biz/ThemeService.java of the component Theme Download Function. Executing a manipulation of the argument httpUrl can lead to server-side request forgery. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-90710?


## How do I fix CVE-2026-90710?

No fix has been published for CVE-2026-90710 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-90710 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90710 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-90710 and fix it if it is affected.

What it is: CVE-2026-90710 is a medium-severity server-side request forgery vulnerability in taisan tarzan-cms, published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90710 exists.

Affected product: taisan tarzan-cms. 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-2026-90710/ (Markdown: https://insights.sbomify.com/CVE-2026-90710/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-90710
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-90710
- OSV: https://osv.dev/vulnerability/CVE-2026-90710

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-90710/
Summaries are generated and may contain mistakes; the official description above is the record.