Is CVE-2026-7304 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-7304 being exploited in the wild.

How severe is CVE-2026-7304?

Critical severity, with a CVSS score of 9.8, published 18 May 2026.

Which products and versions are affected?

sglang (PyPI) ECOSYSTEM:introduced=0.4.1.post7,last_affected=0.5.12; SGLang Project SGLang >= 0.4.1.post7, <= 0.5.12, v0.4.1.post7 and later.

Is there a fix for CVE-2026-7304?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-7304 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-7304?

Check whether you run sglang (PyPI) or SGLang Project SGLang at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-7304: SGLang RCE via unsafe deserialization in custom logit processor

Q: Is there a fix for CVE-2026-7304?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

Q: How is CVE-2026-7304 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2026-7304?

Check whether you run sglang (PyPI) or SGLang Project SGLang at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-7304 · Severity: critical · CVSS 9.8 · Published 2026-05-18

SGLang is an open-source framework used to serve large language models (LLMs) and AI models. A critical security flaw exists when the custom logit processor feature is enabled, allowing an unauthenticated attacker to execute arbitrary commands on the server. This could lead to a complete system takeover, theft of sensitive AI models or data, and disruption of AI services.

Technologies: sglang (PyPI), SGLang Project SGLang. Vendors: PyPI, SGLang Project.

Quick answers

Is CVE-2026-7304 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-7304 being exploited in the wild.
How severe is CVE-2026-7304?: Critical severity, with a CVSS score of 9.8, published 18 May 2026.
Which products and versions are affected?: sglang (PyPI) ECOSYSTEM:introduced=0.4.1.post7,last_affected=0.5.12; SGLang Project SGLang >= 0.4.1.post7, <= 0.5.12, v0.4.1.post7 and later.
Is there a fix for CVE-2026-7304?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-7304 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-7304?: Check whether you run sglang (PyPI) or SGLang Project SGLang at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A deserialization vulnerability (CWE-502) exists in SGLang's custom logit processor component. When the '--enable-custom-logit-processor' flag is set, the generation endpoint accepts a 'custom_logit_processor' field containing a hex-encoded 'dill' payload. The server invokes 'dill.loads()' on this untrusted input without validation, allowing a remote, unauthenticated attacker to achieve arbitrary code execution. This affects versions 0.4.1.post7 through 0.5.12; as of the advisory date, no official patch is available, and users are advised to disable the vulnerable flag and restrict network access.

Affected products

SGLang Project sglang >= 0.4.1.post7, <= 0.5.12

Identifiers

CVE-2026-7304
GHSA-36m8-w8qf-g76p
PYSEC-2026-535

Timeline

2026-03-10: disclosed: Vulnerability reported to maintainers by Antiproof.
2026-05-15: advisory: CERT/CC published Vulnerability Note VU#777338.
2026-05-18: disclosed: GitHub Advisory and NVD entry published.

References

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