Cross-request abort in SGLang lets clients stop other users' requests
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
SGLang through 0.5.22 matches client-supplied request IDs by prefix when aborting requests, a partial string comparison flaw (CWE-187). A remote API client without privileges can abort other users' in-flight generation requests by supplying a short rid, causing denial of service.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
SGLang through 0.5.22 contains a denial of service vulnerability that allows API clients to abort other users' in-flight generation requests by supplying a short client-controlled rid. Attackers can submit streaming /generate requests with single hex character rids and disconnect, triggering prefix-matching abort logic that terminates all other clients' requests.
Why it matters now
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 | up to 0.5.22 | — | No fix listed | CNA |
- sglang Vendorsgl-project Affected up to 0.5.22 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for SGLang.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-19 Threatist record created from CVE-2026-112266
- 2026-10-19 Alias added: GHSA-8v54-r9x8-p94v
References
Other 5
- https://github.com/sgl-project/sglang/issues/45002
- https://github.com/sgl-project/sglang/issues/41474
- https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/managers/scheduler.py#L5458-L5590
- https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/managers/tokenizer_manager.py#L2425-L2436
- https://github.com/sgl-project/sglang/blob/v0.5.22/python/sglang/srt/managers/tokenizer_manager.py#L2240-L2256
More sgl-project vulnerabilities
- 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
Sources
- CVE-2026-112266 · CVE Program
- CVE-2026-112266 · NVD
- FIRST EPSS
- GHSA-8v54-r9x8-p94v · GitHub Advisory Database · CC BY 4.0
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