Medium severity · published Oct 14, 2026
CVE-2026-110809
sgl-project SGLang Session Cleanup session_controller.py Session.create_req denial of service
4.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SG
SGLang · sgl-project
0.5.0; 0.5.1; 0.5.2; 0.5.3; 0.5.4; 0.5.5; +14 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-110809
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-110809
gist.github.com
https://gist.github.com/Yunzez/dbd254603fa2bc74358cb3647423d0ec#file-repro_sglang_session_replace_crash-py
github.com
https://github.com/sgl-project/sglang/
github.com
https://github.com/sgl-project/sglang/issues/41470
github.com
https://github.com/sgl-project/sglang/pull/41483
vuldb.com
https://vuldb.com/cve/CVE-2026-110809
vuldb.com
https://vuldb.com/submit/1004356
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