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CVE-2026-54234

vLLM is a high-throughput and memory-efficient inference and serving engine for LLMs. Prior to 0.24.0, a frontend-legal multi-request speculative decoding workload can cause the rejection sampler to produce a recovered token equal to the model vocabulary size boundary value, which is then converted to negative one when the engine selects the next live token for a request and is written back into the drafter's input ids; that out-of-vocabulary value is later consumed by the model's embedding and
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ed8c960f5edc2bd14f3a83e65fde0ea01646bc74d0f04932db0a7e2ca7dd1114
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-1284","description":"CWE-1284: Improper Validation of Specified Quantity in Input","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:98ccda20596246dbec1daf13885e27ad61a98d3871a30f8773258cbe850da48c · sha256:767095ef6e78b4b6… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:98ccda20596246dbec1daf13885e27ad61a98d3871a30f8773258cbe850da48c · sha256:767095ef6e78b4b6… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"vllm","vendor":"vllm-project","versions":[{"status":"affected","version":"< 0.24.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:98ccda20596246dbec1daf13885e27ad61a98d3871a30f8773258cbe850da48c · sha256:767095ef6e78b4b6… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:98ccda20596246dbec1daf13885e27ad61a98d3871a30f8773258cbe850da48c · sha256:767095ef6e78b4b6… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-1284","description":"CWE-1284: Improper Validation of Specified Quantity in Input","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:98ccda20596246dbec1daf13885e27ad61a98d3871a30f8773258cbe850da48c · sha256:767095ef6e78b4b6… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:98ccda20596246dbec1daf13885e27ad61a98d3871a30f8773258cbe850da48c · sha256:767095ef6e78b4b6… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/vllm-project/vllm/commit/8a5cf1ccd65e8ac7635c402c1ec0b08988bc26ca","tags":["x_refsource_MISC"],"url":"https://github.com/vllm-project/vllm/commit/8a5cf1ccd65e8ac7635c402c1ec0b08988bc26ca"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:98ccda20596246dbec1daf13885e27ad61a98d3871a30f8773258cbe850da48c · sha256:767095ef6e78b4b6… · /containers/cna/references/2
{"name":"https://github.com/vllm-project/vllm/pull/44744","tags":["x_refsource_MISC"],"url":"https://github.com/vllm-project/vllm/pull/44744"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:98ccda20596246dbec1daf13885e27ad61a98d3871a30f8773258cbe850da48c · sha256:767095ef6e78b4b6… · /containers/cna/references/1
{"name":"https://github.com/vllm-project/vllm/security/advisories/GHSA-8wr5-jm2h-8r4f","tags":["x_refsource_CONFIRM"],"url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-8wr5-jm2h-8r4f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:98ccda20596246dbec1daf13885e27ad61a98d3871a30f8773258cbe850da48c · sha256:767095ef6e78b4b6… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-8wr5-jm2h-8r4f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:98ccda20596246dbec1daf13885e27ad61a98d3871a30f8773258cbe850da48c · sha256:767095ef6e78b4b6… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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