TI-2026-76468 Aliases CVE-2026-112268 GHSA-q6x7-8366-3wrx

Authorization bypass in sglang-router HA management routes

MEDIUM 57CWE-863Published 2026-10-19 · Updated 2026-10-22

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: Low · Low · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-863.

Summary

sglang-router through 0.3.2 contains an authorization bypass that lets holders of the data-plane API key reach mesh HA management routes. The /ha/* endpoints skip control-plane Admin role checks, which is an incorrect authorization flaw (CWE-863). A remote attacker with low privileges and no user interaction can read cluster topology, write gossiped configuration, change global rate limits, and call POST /ha/shutdown to silently dissolve HA coordination.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

sglang-router (sgl-model-gateway) through 0.3.2 contains an authorization bypass vulnerability that allows holders of the data-plane API key to access mesh HA management routes because /ha/* endpoints skip control-plane Admin role checks. Attackers can read cluster topology, write gossiped configuration, change global rate limits, and call POST /ha/shutdown to silently dissolve HA coordination.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00324 25th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
sgl-project	sglang-router	up to 0.3.2	—	No fix listed	CNA

sglang-router Vendorsgl-project Affected up to 0.3.2 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for sglang-router.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

2026-10-19 Threatist record created from CVE-2026-112268
2026-10-19 Alias added: GHSA-q6x7-8366-3wrx
2026-10-22 CISA SSVC decision points changed
2026-10-22 Priority changed: LOW → MEDIUM

References

Patch 1

https://github.com/sgl-project/sglang/pull/45017

Other 2

TI-2026-76247 Denial of service in SGLang expert-distribution recording endpoint CVSS 4.0HIGH 8.7
TI-2026-70996 SGLang disables decompression bomb check, enabling denial of service CVSS 4.0HIGH 8.7
TI-2026-70994 SGLang Memory Exhaustion DoS via Qwen-VL Video Preprocessing CVSS 4.0HIGH 8.7
TI-2026-70993 Decompression amplification in SGLang load_audio exhausts memory CVSS 4.0HIGH 8.7
TI-2026-65453 SGLang through 0.5.20 Denial of Service via Duplicate bootstrap_room CVSS 4.0HIGH 8.7
TI-2026-75290 Code injection in SGLang debug dumper filter CVSS 4.0CRITICAL 9.2

See all 21 →

Sources

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