Deserialization of Untrusted Data Affecting sglang package, versions [0.5.5,0.5.10.post1)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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-15470987
- published12 Mar 2026
- disclosed12 Mar 2026
- creditIgor Stepansky
Introduced: 12 Mar 2026
CVE-2026-3059 (opens in a new tab)How to fix?
Upgrade sglang to version 0.5.10.post1 or higher.
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 due to the use of the pickle.loads function. An attacker can execute arbitrary code by sending malicious serialized payloads to the exposed ZMQ REP socket, as received data is deserialized without authentication, message validation, or transport protection. This allows malicious pickle payloads to be executed immediately upon deserialization.