CVE-2026-92972

HIGHPre-NVD 8.68.6—
EchelonGraph scoreHIGH confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2026-09-17. the CNA's CVSS baseline 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 4 sources updated this week
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.6Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

SGLang through 0.5.19 in prefill/decode disaggregation mode contains an unauthenticated PUT /route endpoint on the prefill bootstrap service that allows attackers to poison the KV transfer routing table. Attackers can supply arbitrary rank_ip and rank_port values to redirect decode workers to attacker-controlled endpoints, causing denial of service or disclosure of KV transfer metadata including session identifiers and tensor-parallel topology parameters.

CVSS v3
8.6
EG Score
8.6(high)
EG Risk
54(Track)
EG Risk 54/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity86% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

September 17, 2026

Last Modified

September 18, 2026

Advisory Details (5)

Auto-updated Sep 17, 2026
No patch confirmed yet.
generic

SGLang through 0.5.19 Unauthenticated Route Poisoning via PUT endpoint | Advisories | VulnCheck

https://www.vulncheck.com/advisories/sglang-through-0.5.19-unauthenticated-route-poisoning-via-put-endpoint
generic

GitHub - sgl-project/sglang: SGLang is a high-performance serving framework for large language models and multimodal models. · GitHub

https://github.com/sgl-project/sglang
generic

sglang/python/sglang/srt/disaggregation/common/conn.py at v0.5.19 · sgl-project/sglang · GitHub

https://github.com/sgl-project/sglang/blob/v0.5.19/python/sglang/srt/disaggregation/common/conn.py#L1716-L1718
generic

sglang/python/sglang/srt/disaggregation/common/conn.py at v0.5.19 · sgl-project/sglang · GitHub

https://github.com/sgl-project/sglang/blob/v0.5.19/python/sglang/srt/disaggregation/common/conn.py#L1736-L1810
generic

[Bug]Unauthenticated PUT /route on Bootstrap HTTP allows route poisoning and metadata redirection · Issue #39400 · sgl-project/sglang · GitHub

https://github.com/sgl-project/sglang/issues/39400

Vendor Advisories for CVE-2026-92972(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 19× in last 7d / 19× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-20 20:42 UTCEG score recompute
  2. 2026-09-20 20:42 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 07:39 UTCGHSA enrichment
  5. 2026-09-19 18:34 UTCEG score recompute
  6. 2026-09-19 18:34 UTCGHSA enrichment
  7. 2026-09-19 05:31 UTCEG score recompute
  8. 2026-09-19 05:31 UTCGHSA enrichment
  9. 2026-09-18 19:28 UTCEPSS rescore
  10. 2026-09-18 16:29 UTCEG score recompute
  11. 2026-09-18 16:29 UTCGHSA enrichment
  12. 2026-09-18 09:32 UTCGHSA enrichment
  13. 2026-09-17 20:27 UTCEG score recompute
  14. 2026-09-17 20:27 UTCGHSA enrichment
  15. 2026-09-17 19:30 UTCEG score recompute
  16. 2026-09-17 19:30 UTCGHSA enrichment
  17. 2026-09-17 14:23 UTCEG score recompute
  18. 2026-09-17 13:51 UTCEG score recompute
  19. 2026-09-17 13:49 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-92972?
CVE-2026-92972 is a high vulnerability published on September 17, 2026. SGLang through 0.5.19 in prefill/decode disaggregation mode contains an unauthenticated PUT /route endpoint on the prefill bootstrap service that allows attackers to poison the KV transfer routing table. Attackers can supply arbitrary rankip and rankport values to redirect decode workers to…
When was CVE-2026-92972 disclosed?
CVE-2026-92972 was first published in the National Vulnerability Database on September 17, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-92972 actively exploited?
CVE-2026-92972 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 73.4% of all scored CVEs.
What is the CVSS score of CVE-2026-92972?
CVE-2026-92972 has a CVSS v4.0 base score of 8.6 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-92972?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-92972, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-92972

Explore →

Is Your Infrastructure Affected by CVE-2026-92972?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs