Deserialization of Untrusted Data Affecting sglang package, versions [0.4.1.post7,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PYTHON-SGLANG-17111815
- published31 May 2026
- disclosed18 May 2026
- creditChristopher Cullen
Introduced: 18 May 2026
CVE-2026-7304 (opens in a new tab)How to fix?
There is no fixed version for sglang.
Overview
sglang is a SGLang is a fast serving framework for large language models and vision language models.
Affected versions of this package are vulnerable to Deserialization of Untrusted Data via the --enable-custom-logit-processor option, which allows untrusted Python objects to be deserialized through the dill.loads function. An attacker can execute arbitrary code remotely by sending crafted serialized objects to the affected service.
Note: This is only exploitable if the --enable-custom-logit-processor option is enabled.
Details
Serialization is a process of converting an object into a sequence of bytes which can be persisted to a disk or database or can be sent through streams. The reverse process of creating object from sequence of bytes is called deserialization. Serialization is commonly used for communication (sharing objects between multiple hosts) and persistence (store the object state in a file or a database). It is an integral part of popular protocols like Remote Method Invocation (RMI), Java Management Extension (JMX), Java Messaging System (JMS), Action Message Format (AMF), Java Server Faces (JSF) ViewState, etc.
Deserialization of untrusted data (CWE-502) is when the application deserializes untrusted data without sufficiently verifying that the resulting data will be valid, thus allowing the attacker to control the state or the flow of the execution.