by Kastro
Paper/Archive/CVE-2026-86793

CVE-2026-86793

SGLang SGLang — CVE-2026-86793

EPSS 0.8%public exploitCVSS 9.8
critical.is priorityof 100
51
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 55.6.556 × 2011.1Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
SGLang≤ 0.5.18–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitvicone.com/blog/cve-2026-86793-sglang-bypass-could-let-attackers-run-code-on-ai-serversrefgithub.com/sgl-project/sglang/tree/main