CVE-2026-71486

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Source

https://cve.org/CVERecord?id=CVE-2026-71486

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71486.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-71486

Aliases

Downstream

CGA (5)

MINI (3)

Published

2026-08-17T20:13:06Z

Modified

2026-11-04T02:47:50Z

Severity

4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L CVSS Calculator

Summary

vLLM: Derender endpoints decode caller-supplied GenerateResponse token IDs without output bounds

Details

vLLM is an inference and serving engine for large language models. Prior to 0.26.0, the /v1/completions/derender and /v1/chat/completions/derender endpoints accept caller-supplied GenerateResponse objects whose generate_responses, choices, token_ids, prompt_logprobs, logprobs.content, top_logprobs, and routed_experts structures are processed by OnlineDerenderer and tokenizer.decode before max_model_len, max_tokens, max_num_seqs, or response-size limits are enforced, allowing an authenticated API client to consume excessive CPU and memory and produce oversized responses. This issue is fixed in version 0.26.0.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-400",
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71486.json"
}

References

Affected packages

Git / github.com/vllm-project/vllm

Affected ranges

Type

GIT

Repo

https://github.com/vllm-project/vllm

Events

Introduced

Fixed

ffd46bfab2128bb84146050e98b51a617c6575ab

Fixed

8e61b646e2d157f9b93451fa048f9c8530c8a67b

Fixed

568afb3a13806beb53bb2e6bd518269357b237c0

Database specific

Show details

{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "0.26.0"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "range": [
                {
                    "fixed": "8e61b646e2d157f9b93451fa048f9c8530c8a67b"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v0.26.0",
            "range": [
                {
                    "fixed": "568afb3a13806beb53bb2e6bd518269357b237c0"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

Other

submission

v0.*

v0.1.0

v0.1.1

v0.1.2

v0.1.3

v0.1.4

v0.1.5

v0.1.6

v0.1.7

v0.10.0

v0.10.0rc1

v0.10.0rc2

v0.10.1rc1

v0.10.2rc1

v0.10.2rc2

v0.11.0rc1

v0.11.1

v0.11.1rc0

v0.11.1rc1

v0.11.1rc2

v0.11.1rc3

v0.11.1rc4

v0.11.1rc5

v0.11.1rc6

v0.13.0rc1

v0.14.0rc0

v0.14.0rc1

v0.15.0rc1

v0.15.2rc0

v0.16.0rc0

v0.16.0rc1

v0.16.1rc0

v0.17.0rc0

v0.17.1rc0

v0.17.2rc0

v0.18.0rc0

v0.18.1rc0

v0.18.2rc0

v0.19.1rc0

v0.19.2rc0

v0.2.0

v0.2.1

v0.2.2

v0.2.3

v0.2.4

v0.2.5

v0.2.6

v0.2.7

v0.20.1rc0

v0.20.2rc0

v0.21.1rc0

v0.22.1rc0

v0.23.1rc0

v0.3.0

v0.3.1

v0.3.2

v0.3.3

v0.4.0

v0.4.0.post1

v0.4.1

v0.4.2

v0.4.3

v0.5.0

v0.5.0.post1

v0.5.1

v0.5.2

v0.5.3

v0.5.3.post1

v0.5.4

v0.5.5

v0.6.0

v0.6.1

v0.6.1.post1

v0.6.1.post2

v0.6.2

v0.6.3

v0.6.3.post1

v0.6.4

v0.6.4.post1

v0.6.5

v0.6.6

v0.6.6.post1

v0.7.0

v0.7.1

v0.7.2

v0.7.3

v0.8.0rc1

v0.8.0rc2

v0.8.1

v0.8.2

v0.8.3rc1

v0.8.4

v0.9.0

v0.9.1

v0.9.1rc1

v0.9.1rc2

v0.9.2rc1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71486.json"