CVE-2025-10164Network attack vector

Unauthenticated code execution via unsafe pickle deserialization

Published Sep 9, 2025 · Updated Sep 10, 2025

Unsafe deserialization in SGLang 0.4.6 allows remote attackers to execute arbitrary code through a crafted weight-update request. The /update_weights_from_tensor path base64-decodes serialized_named_tensors and passes the bytes to ForkingPickler.loads without restricting loadable classes. The HTTP endpoint must be network-reachable, and successful exploitation runs code with the SGLang server process's permissions.

CVSS severity7.3
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in SGLang 0.4.6 allows remote attackers to execute arbitrary code through a crafted weight-update request. The /update_weights_from_tensor path base64-decodes serialized_named_tensors and passes the bytes to ForkingPickler.loads without restricting loadable classes. The HTTP endpoint must be network-reachable, and successful exploitation runs code with the SGLang server process's permissions.

The record

CVE
CVE-2025-10164
Published
Sep 9, 2025
Updated
Sep 10, 2025
Vendor
SGLang
Product
SGLang
Classifications
CWE-502, CWE-20, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.4.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SGLang · SGLangversion=0.4.6

Published CVSS scores

5.5VulDBCVSS: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
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
CWE-20Improper Input Validation
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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