# CVE-2026-8740: Sanluan PublicCMS templateResult API TemplateResultDirective.java execute special elements used in a template engine

> Remote attackers can execute arbitrary code via template injection in the PublicCMS templateResult API, requiring permissions.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **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:** 17 May 2026
- **Updated:** 18 May 2026
- **Also known as:** GHSA-pqmw-x4mq-chh8

## What is CVE-2026-8740?

CVE-2026-8740 is a medium-severity code injection vulnerability in Sanluan PublicCMS, published on 17 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A flaw has been found in Sanluan PublicCMS 5.202506.d. The impacted element is the function execute of the file publiccms-core/src/main/java/com/publiccms/views/directive/tools/TemplateResultDirective.java of the component templateResult API. This manipulation of the argument templateContent causes improper neutralization of special elements used in a template engine. The attack is possible to be carried out remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-791 (Incomplete Filtering of Special Elements), CWE-1336 (Improper Neutralization of Special Elements Used in a Template Engine)

## Which versions are affected by CVE-2026-8740?


## How do I fix CVE-2026-8740?

No fix has been published for CVE-2026-8740 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-8740 being exploited?

There is no known exploitation of CVE-2026-8740 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-8740 and fix it if it is affected.

What it is: CVE-2026-8740 is a medium-severity code injection vulnerability in Sanluan PublicCMS, published on 17 May 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-2026-8740 in the wild and no public exploit code.

Affected product: Sanluan PublicCMS. 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-2026-8740/ (Markdown: https://insights.sbomify.com/CVE-2026-8740/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-8740
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-8740
- OSV: https://osv.dev/vulnerability/CVE-2026-8740

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-8740/
Summaries are generated and may contain mistakes; the official description above is the record.