# CVE-2026-15971: CVE-2026-15971

> Attackers can execute arbitrary code via inference requests if the optional dumper subsystem is enabled, requiring configuration changes to mitigate.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Jul 2026
- **Updated:** 31 Jul 2026
- **Also known as:** GHSA-96j3-rjf9-2hxp, GHSA-h6rf-77vv-9mvj

## What is CVE-2026-15971?

CVE-2026-15971 is a critical code injection vulnerability in SGLang, published on 30 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

SGLang contains an RCE vulnerability when the optional dumper subsystem is enabled, allowing for a sandbox escape when DUMPER_SERVER_PORT is set, enabling code execution on inference requests.

Weakness: CWE-95 (Improper Neutralization of Directives in Dynamically Evaluated Code)

## Which versions are affected by CVE-2026-15971?

It affects 1 product.


Products: Lmsys Sglang.

## How do I fix CVE-2026-15971?

No fix has been published for CVE-2026-15971 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-15971 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15971 exists.

## Other vulnerabilities in SGLang

- [CVE-2026-15969](https://insights.sbomify.com/CVE-2026-15969/): CVE-2026-15969 (critical 9.8)
- [CVE-2026-15976](https://insights.sbomify.com/CVE-2026-15976/): CVE-2026-15976 (critical 9.8)
- [CVE-2026-7301](https://insights.sbomify.com/CVE-2026-7301/): CVE-2026-7301 (critical 9.8)
- [CVE-2026-7304](https://insights.sbomify.com/CVE-2026-7304/): CVE-2026-7304 (critical 9.8)
- [CVE-2026-5760](https://insights.sbomify.com/CVE-2026-5760/): CVE-2026-5760 (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-15971 and fix it if it is affected.

What it is: CVE-2026-15971 is a critical code injection vulnerability in SGLang, published on 30 Jul 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-2026-15971 exists.

Affected product: SGLang. 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-2026-15971/ (Markdown: https://insights.sbomify.com/CVE-2026-15971/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-15971
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-15971
- OSV: https://osv.dev/vulnerability/CVE-2026-15971

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-15971/
Summaries are generated and may contain mistakes; the official description above is the record.