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TI-2026-68367 Aliases CVE-2026-105756GHSA-2823-qmq8-rwvj

Loose cache_salt validation in vLLM lets one request crash EngineCore

Priority LOW 29CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 3 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-248.

Summary

vLLM before 0.30.0 accepts a non-empty cache_salt value in OpenAI-compatible request models without enforcing the character and length rules required by the IPCCacheServerKey consumer in LMCache-MP. On deployments using the LMCache-MP connector, a salt with a forbidden character or excess length raises an uncaught ValueError during scheduler cache lookup (CWE-20). This terminates EngineCore and denies service to all concurrent users. A remote user with low privileges can trigger it with a single request.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

vLLM is an inference and serving engine for large language models. Prior to 0.30.0, OpenAI-compatible request models accept a non-empty cache_salt value without enforcing the character and length restrictions required by the IPCCacheServerKey consumer in LMCache-MP. On deployments using the LMCache-MP connector, a salt that contains a forbidden character or exceeds the permitted length can raise an uncaught ValueError during scheduler cache lookup, causing EngineCore to terminate and denying service to all concurrent users. This issue is fixed in version 0.30.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00332 26th percentileScored 2026-11-07
Fix Partial vllm (vllm-project): 0.30.0vllm (PyPI): 0.30.0Red Hat: 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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

VendorProductAffected versionsFixed inStatusSource
vllm-projectvllmbefore 0.30.00.30.0Patch availableCNA
—vllm (PyPI)before 0.30.00.30.0Patch availableGHSA-2823-qmq8-rwvj
  • vllm Vendorvllm-project Affected before 0.30.0 Fixed in 0.30.0 Patch available CNA
  • vllm (PyPI) Vendor— Affected before 0.30.0 Fixed in 0.30.0 Patch available GHSA-2823-qmq8-rwvj

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*before 0.30.0VulnerablevLLM
  • cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:* Versions before 0.30.0 Vulnerable ·vLLM

Remediation

Upgrade the vllm package on PyPI to version 0.30.0, which fixes the flaw. Red Hat gives no fix plan for Red Hat AI Inference Server, Red Hat Enterprise Linux AI (RHEL AI) 3 or Red Hat OpenShift AI (RHOAI).

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA vllm (vllm-project) Fixed in 0.30.0
  • Fix · GHSA-2823-qmq8-rwvj vllm (PyPI) Fixed in 0.30.0 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat AI Inference ServerAffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet: Fix deferred
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-06 Threatist record created from CVE-2026-105756
  2. 2026-10-06 Alias added: GHSA-2823-qmq8-rwvj
  3. 2026-10-06 Fix available: PyPI/[email protected] · GHSA-2823-qmq8-rwvj
  4. 2026-10-06 CVSS score added · GHSA-2823-qmq8-rwvj
  5. 2026-10-06 Weakness changed · GHSA-2823-qmq8-rwvj
  6. 2026-10-06 5 new references · GHSA-2823-qmq8-rwvj
  7. 2026-10-06 Affected versions changed · Red Hat
  8. 2026-10-06 CVSS score added · Red Hat
  9. 2026-10-06 CISA SSVC decision points changed
  10. 2026-10-06 Priority changed: MEDIUM → LOW

References

Patch 2

Advisory 1

Other 2

  • TI-2024-10229 Remote Code Execution in vllm-project/vllm CVSS 3.0CRITICAL 9.8
  • TI-2024-08404 Remote Code Execution in vllm-project/vllm CVSS 3.1CRITICAL 9.8
  • TI-2026-36017 vLLM: OpenAI auth bypass CVSS 3.1CRITICAL 9.1
  • TI-2026-63056 vLLM before 0.28.0 Denial of Service via negative token ID CVSS 4.0HIGH 8.7
  • TI-2026-04308 Hardcoded trust_remote_code=True in vllm-project/vllm Bypasses User Security Control CVSS 3.0HIGH 8.8
  • TI-2026-39137 vLLM: Remote DoS in vLLM via Invalid Recovered Token Reinjection CVSS 3.1HIGH 7.5
See all 124 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences