CVE-2026-86793

CRITICAL 9.8

CVE-2026-86793

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	sglang
Product	sglang
Published	Sep 11, 2026
Last Updated	Sep 14, 2026

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Affected Versions

SGLang / SGLang

0 ≤ 0.5.18

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vicone.com: https://vicone.com/blog/cve-2026-86793-sglang-bypass-could-let-attackers-run-code-on-ai-servers/ github.com: https://github.com/sgl-project/sglang/tree/main