CVE-2026-15969Public exploitNetwork attack vectorHinoki check available

Unauthenticated command execution via SafeUnpickler bypass

Published Jul 30, 2026 · Updated Jul 30, 2026

Deserialization in SGLang 0 through 0.5.15 allows remote attackers to execute arbitrary commands through its LoRA tensor-loading route. SafeUnpickler allows builtins.getattr and builtins.import, letting a crafted base64 pickle resolve os.system during deserialization. Network access to the server port is sufficient because deserialization precedes the LoRA guard, and the route omits authentication even with an admin API key.

CVSS severity9.8
Critical
EPSS probability1.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Deserialization in SGLang 0 through 0.5.15 allows remote attackers to execute arbitrary commands through its LoRA tensor-loading route. SafeUnpickler allows builtins.getattr and builtins.import, letting a crafted base64 pickle resolve os.system during deserialization. Network access to the server port is sufficient because deserialization precedes the LoRA guard, and the route omits authentication even with an admin API key.

The record

CVE
CVE-2026-15969
Published
Jul 30, 2026
Updated
Jul 30, 2026
Vendor
SGLang
Product
SGLang
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 30, 2026Record 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 <=v0.5.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SGLang · SGLangversion=0 <=v0.5.15

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

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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