TI-2026-74564 Aliases CVE-2026-110809

Denial of service in sgl-project SGLang session cleanup

MEDIUM 57CWE-404Published 2026-10-14 · Updated 2026-10-15

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-404.

Summary

SGLang up to 0.5.19 has a flaw in session cleanup in the Session.create_req function of session_controller.py. The code does not properly release resources (CWE-404). A remote attacker with low privileges can cause a denial of service. The exploit has been publicly disclosed.

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

Description from the CNA

A security vulnerability has been detected in sgl-project SGLang up to 0.5.19. Affected by this issue is the function Session.create_req of the file python/sglang/srt/session/session_controller.py of the component Session Cleanup. Such manipulation leads to denial of service. The attack may be performed from remote. The exploit has been disclosed publicly and may be used. The pull request to fix this issue awaits acceptance.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00324 25th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

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	0.5.0; 0.5.1; 0.5.2; 0.5.3; 0.5.4; 0.5.5; 0.5.6; 0.5.7; 0.5.8; 0.5.9; 0.5.10; 0.5.11; 0.5.12; 0.5.13; 0.5.14; 0.5.15; 0.5.16; 0.5.17; 0.5.18; 0.5.19	—	No fix listed	CNA

SGLang Vendorsgl-project Affected 0.5.0; 0.5.1; 0.5.2; 0.5.3; 0.5.4; 0.5.5; 0.5.6; 0.5.7; 0.5.8; 0.5.9; 0.5.10; 0.5.11; 0.5.12; 0.5.13; 0.5.14; 0.5.15; 0.5.16; 0.5.17; 0.5.18; 0.5.19 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:sgl-project:sglang::::::::	—	—	—

cpe:2.3:a:sgl-project:sglang:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

The sources list no fixed version for SGLang. A pull request to fix this issue awaits acceptance.

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

Timeline

2026-10-15 Threatist record created from CVE-2026-110809
2026-10-15 CISA SSVC decision points changed
2026-10-15 Priority changed: LOW → MEDIUM

References

Exploit 1

https://gist.github.com/Yunzez/dbd254603fa2bc74358cb3647423d0ec#file-repro_sglang_session_replace_crash-py

Patch 1

https://github.com/sgl-project/sglang/pull/41483

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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