# CVE-2026-90511: GongShengyue OnlineBooks listSplit BooksServlet.java sql injection

> Remote attackers can exploit SQL injection in the listSplit interface to read or modify database contents.

- **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:** 13 Sep 2026
- **Updated:** 16 Sep 2026
- **Also known as:** GHSA-qc23-8529-4g4m

## What is CVE-2026-90511?

CVE-2026-90511 is a medium-severity SQL injection vulnerability in GongShengyue OnlineBooks, published on 13 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was detected in GongShengyue OnlineBooks up to dfc5eacc08d3b0396c266049548618f6fb9587ea. This vulnerability affects unknown code of the file src/cn/ylcto/book/servlet/BooksServlet.java of the component listSplit Interface. The manipulation of the argument column results in sql injection. The attack may be performed from remote. The exploit is now public and may be used. This product utilizes a rolling release system for continuous delivery, and as such, version information for affected or updated releases is not disclosed.

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command), CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2026-90511?


## How do I fix CVE-2026-90511?

No fix has been published for CVE-2026-90511 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-90511 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90511 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-90511 and fix it if it is affected.

What it is: CVE-2026-90511 is a medium-severity SQL injection vulnerability in GongShengyue OnlineBooks, published on 13 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90511 exists.

Affected product: GongShengyue OnlineBooks. 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-2026-90511/ (Markdown: https://insights.sbomify.com/CVE-2026-90511/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-90511
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-90511
- OSV: https://osv.dev/vulnerability/CVE-2026-90511

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-90511/
Summaries are generated and may contain mistakes; the official description above is the record.