Cache aliasing in vLLM exposes other requests' cached data
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 3 without a fix
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-284.
Summary
vLLM before 0.31.0 contains a cache aliasing flaw (CWE-284) in which caller-controlled values such as EXIF ImageID or cache_salt can collide with shared cache keys. An authenticated remote attacker with low privileges can receive another request's cached processed media or reuse first-block KV state from another request.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
vLLM before 0.31.0 contains a cache aliasing vulnerability that allows authenticated attackers to collide shared cache keys by supplying caller-controlled values such as EXIF ImageID or cache_salt. Attackers can set a UUID EXIF ImageID to receive another request's cached processed media, or match cache_salt to a LoRA name to reuse first-block KV state.
Why it matters now
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| vllm-project | vllm | before 0.31.0 | 0.31.0 | Patch available | CNA |
- vllm Vendorvllm-project Affected before 0.31.0 Fixed in 0.31.0 Patch available CNA
Remediation
Upgrade vllm to version 0.31.0, which fixes the flaw. Red Hat lists no available plan for Red Hat AI Inference Server, Red Hat Enterprise Linux AI (RHEL AI) 3 and Red Hat OpenShift AI (RHOAI).
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
- Fix · CNA vllm (vllm-project) Fixed in 0.31.0
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
vllm-project vllm 0.31.0
7 records Highest priority Priority MEDIUM 3 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2026-78668 Uncontrolled resource use in vLLM lets clients exhaust server memoryPriority MEDIUM 44
- TI-2026-78665 Memory exhaustion in vLLM MOSS-Audio serving through /tokenizePriority MEDIUM 44
- TI-2026-78666 Remote code execution in vLLM via mm_processor_kwargs.code_revisionPriority MEDIUM 42
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat AI Inference Server | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-21 Threatist record created from CVE-2026-114054
- 2026-10-21 Affected versions changed · Red Hat
- 2026-10-21 CVSS score added · Red Hat
- 2026-10-22 Priority changed: MEDIUM → LOW
- 2026-10-28 CISA SSVC decision points changed
References
More vllm-project vulnerabilities
- 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
Sources
- CVE-2026-114054 · CVE Program
- CVE-2026-114054 · NVD
- FIRST EPSS
- CVE-2026-114054 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences