CVE-2026-93688

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-18. the CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: 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 with Mooncake KV transfer backend fails to validate bootstrap_room values, allowing unbounded transfer state allocation. Unauthenticated attackers can reach the decode engine's POST /generate endpoint and submit arbitrary bootstrap_room values to exhaust prefill process memory until out-of-memory termination.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

September 18, 2026

Last Modified

September 18, 2026

Advisory Details (7)

Auto-updated Sep 18, 2026
No patch confirmed yet.
generic

SGLang through 0.5.19 Unbounded Memory Allocation via bootstrap_room | Advisories | VulnCheck

https://www.vulncheck.com/advisories/sglang-through-0.5.19-unbounded-memory-allocation-via-bootstrap-room
generic

sglang/python/sglang/srt/managers/scheduler.py at v0.5.19 · sgl-project/sglang · GitHub

https://github.com/sgl-project/sglang/blob/v0.5.19/python/sglang/srt/managers/scheduler.py#L2672-L2690
generic

sglang/python/sglang/srt/managers/io_struct.py at v0.5.19 · sgl-project/sglang · GitHub

https://github.com/sgl-project/sglang/blob/v0.5.19/python/sglang/srt/managers/io_struct.py#L281
generic

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

https://github.com/sgl-project/sglang/blob/v0.5.19/python/sglang/srt/disaggregation/mooncake/conn.py#L1988-L1990
generic

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

https://github.com/sgl-project/sglang/blob/v0.5.19/python/sglang/srt/disaggregation/mooncake/conn.py#L2118-L2119
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

[Bug] Unbounded memory growth via orphan bootstrap_room injection leads to OOM Kill · Issue #39428 · sgl-project/sglang · GitHub

https://github.com/sgl-project/sglang/issues/39428

Vendor Advisories for CVE-2026-93688(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 12× in last 7d / 12× 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. 2026-09-21 02:42 UTCEG score recompute
  2. 2026-09-21 02:42 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 15:03 UTCGHSA enrichment
  5. 2026-09-20 03:25 UTCEG score recompute
  6. 2026-09-20 03:25 UTCGHSA enrichment
  7. 2026-09-19 15:46 UTCGHSA enrichment
  8. 2026-09-19 04:05 UTCEG score recompute
  9. 2026-09-19 04:05 UTCGHSA enrichment
  10. 2026-09-18 16:27 UTCEG score recompute
  11. 2026-09-18 15:24 UTCEG score recompute
  12. 2026-09-18 15:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-93688?
CVE-2026-93688 is a high vulnerability published on September 18, 2026. SGLang through 0.5.19 in prefill/decode disaggregation mode with Mooncake KV transfer backend fails to validate bootstraproom values, allowing unbounded transfer state allocation. Unauthenticated attackers can reach the decode engine's POST /generate endpoint and submit arbitrary bootstraproom…
When was CVE-2026-93688 disclosed?
CVE-2026-93688 was first published in the National Vulnerability Database 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-2026-93688 actively exploited?
CVE-2026-93688 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 66.4% of all scored CVEs.
What is the CVSS score of CVE-2026-93688?
CVE-2026-93688 has a CVSS v4.0 base score of 7.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-93688?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-93688, 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

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