# CVE-2026-19758: dromara lamp-cloud chunk-check endpoint FileChunkController.java path traversal

> Remote attackers can exploit a path traversal vulnerability in the chunk-check endpoint to read or modify arbitrary files.

- **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:** 13 Aug 2026
- **Updated:** 18 Aug 2026
- **Also known as:** GHSA-9rf9-wxxc-3cr5

## What is CVE-2026-19758?

CVE-2026-19758 is a medium-severity path traversal vulnerability in dromara lamp-cloud, published on 13 Aug 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 dromara lamp-cloud up to 5.10.0. This issue affects some unknown processing of the file FileChunkController.java of the component chunk-check endpoint. Executing a manipulation of the argument Name can lead to path traversal. The attack can 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-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-19758?


## How do I fix CVE-2026-19758?

No fix has been published for CVE-2026-19758 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-19758 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19758 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-19758 and fix it if it is affected.

What it is: CVE-2026-19758 is a medium-severity path traversal vulnerability in dromara lamp-cloud, published on 13 Aug 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-2026-19758 exists.

Affected product: dromara lamp-cloud. 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-2026-19758/ (Markdown: https://insights.sbomify.com/CVE-2026-19758/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-19758
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-19758
- OSV: https://osv.dev/vulnerability/CVE-2026-19758

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-19758/
Summaries are generated and may contain mistakes; the official description above is the record.