Allocation of Resources Without Limits or Throttling in vLLM - CVE-2026-100647
Published: October 6, 2026
Vulnerability identifier: #VU153327
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-100647
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in the cache_salt parameter when processing HTTP requests containing an oversized cache_salt value. A remote attacker can send HTTP requests with oversized cache_salt values to cause a denial of service.
Prefix caching is enabled by default.
Affected software
vLLM
How to mitigate CVE-2026-100647
Install security update from vendor's website.
vLLM - update to 0.29.0