CVE-2026-110809sgl-project SGLang Session Cleanup session_controller.py Session.create_req denial of service
- 5.3MediumCVSS base score
- 0.32%Exploitation in 30 daysEPSS · top 74% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- YesPublic exploitsa reference or SSVC says so
Description
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: a proof of concept is public.
Show the exploits1
References tagged exploit1 reference
Timeline
ID reserved
By VulDB
Published
- 1 day later
· 1 day later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| VulDBCNA (assigner) | 4.0 | Medium5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P |
| VulDBCNA (assigner) | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C |
| VulDBCNA (assigner) | 3.0 | Medium4.3 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C |
| VulDBCNA (assigner) | 2.0 | Medium4.0 | AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:C |
| NVDNVD · Deferred | 4.0 | Low2.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.32% · top 74% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Affected products
- affected 0.5.0
- affected 0.5.1
- affected 0.5.2
- affected 0.5.3
- affected 0.5.4
- affected 0.5.5
- affected 0.5.6
- affected 0.5.7
- affected 0.5.8
- affected 0.5.9
- affected 0.5.10
- affected 0.5.11
- affected 0.5.12
- affected 0.5.13
- affected 0.5.14
- affected 0.5.15
- affected 0.5.16
- affected 0.5.17
- affected 0.5.18
- affected 0.5.19
References
References8
- VDB-420279 | sgl-project SGLang Session Cleanup session_controller.py Session.create_req denial of service (opens in a new tab)vdb-entrytechnical-description
- VDB-420279 | CTI Indicators (IOB, IOC, TTP, IOA) (opens in a new tab)signaturepermissions-required
- CVE-2026-110809 | CVE Analysis and Report (opens in a new tab)third-party-advisory
- Submit #1004356 | SGLang Project SGLang(SGLang Runtime) 0.5.19 Remote Denial of Service (opens in a new tab)third-party-advisory
- https://github.com/sgl-project/sglang/issues/41470 (opens in a new tab)issue-tracking
- https://github.com/sgl-project/sglang/pull/41483 (opens in a new tab)issue-trackingpatch
- https://gist.github.com/Yunzez/dbd254603fa2bc74358cb3647423d0ec#file-repro_sglang_session_replace_crash-py (opens in a new tab)exploit
- https://github.com/sgl-project/sglang/ (opens in a new tab)product
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-101799 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-110809)Record last updated .