CVE-2026-92972Public exploitNetwork attack vector

Service interruption and metadata disclosure via route poisoning

Published Sep 17, 2026 · Updated Sep 17, 2026

Missing authentication in SGLang 0 through 0.5.19 allows remote attackers to redirect KV transfers through the prefill bootstrap service. The PUT /route handler accepts unauthenticated rank_ip and rank_port values and writes them directly into the routing table trusted by decode workers. Reachability requires prefill/decode disaggregation mode and network access to the bootstrap service; poisoned routes can interrupt inference or disclose session and topology metadata.

CVSS severity8.8
High
EPSS probability0.47%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in SGLang 0 through 0.5.19 allows remote attackers to redirect KV transfers through the prefill bootstrap service. The PUT /route handler accepts unauthenticated rank_ip and rank_port values and writes them directly into the routing table trusted by decode workers. Reachability requires prefill/decode disaggregation mode and network access to the bootstrap service; poisoned routes can interrupt inference or disclose session and topology metadata.

The record

CVE
CVE-2026-92972
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
SGLang Project
Product
SGLang
Classifications
CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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 <=0.5.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SGLang Project · SGLangversion=0 <=0.5.19

Published CVSS scores

8.8VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
8.6NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
9.0NVDAV:N/AC:L/Au:N/C:P/I:P/A:C

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
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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