SGLang allows unauthenticated pickle deserialization through /update_weights_from_tensor when no auth keys are configured, and the SafeUnpickler policy can be bypassed because builtins.import and builtins.getattr are resolvable, enabling code execution via pickle REDUCE.
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Fixes

Solution

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Workaround

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History

Fri, 11 Sep 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Sglang
Sglang sglang
Vendors & Products Sglang
Sglang sglang

Fri, 11 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-502

Fri, 11 Sep 2026 12:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-502

Fri, 11 Sep 2026 11:45:00 +0000

Type Values Removed Values Added
Description SGLang allows unauthenticated pickle deserialization through /update_weights_from_tensor when no auth keys are configured, and the SafeUnpickler policy can be bypassed because builtins.import and builtins.getattr are resolvable, enabling code execution via pickle REDUCE.
Title CVE-2026-86793
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2026-09-11T11:35:20.812Z

Reserved: 2026-09-08T11:56:03.107Z

Link: CVE-2026-86793

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-09-11T12:16:52.427

Modified: 2026-09-11T14:46:12.730

Link: CVE-2026-86793

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-11T16:45:14Z

Weaknesses

No weakness.