CVE-2026-6607

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Source
https://cve.org/CVERecord?id=CVE-2026-6607
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-6607.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-6607
Aliases
Published
2026-04-20T05:00:23.135Z
Modified
2026-07-15T01:48:57.133495861Z
Severity
  • 5.5 (Medium) CVSS_V4 - 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/E:P CVSS Calculator
Summary
lm-sys fastchat Worker API Endpoint api_generate resource consumption
Details

A security vulnerability has been detected in lm-sys fastchat up to 0.2.36. This issue affects the function apigenerate of the component Worker API Endpoint. The manipulation leads to resource consumption. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The identifier of the patch is c9e84b89c91d45191dc24466888de526fa04cf33. It is suggested to install a patch to address this issue. Commit ff66426 patched this issue in apigenerate of basemodelworker.py and did miss other entry points.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6607.json",
    "cna_assigner": "VulDB",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "0.2.0"
                },
                {
                    "last_affected": "0.2.0"
                },
                {
                    "introduced": "0.2.2"
                },
                {
                    "last_affected": "0.2.2"
                },
                {
                    "introduced": "0.2.4"
                },
                {
                    "last_affected": "0.2.4"
                },
                {
                    "introduced": "0.2.6"
                },
                {
                    "last_affected": "0.2.6"
                },
                {
                    "introduced": "0.2.7"
                },
                {
                    "last_affected": "0.2.7"
                },
                {
                    "introduced": "0.2.8"
                },
                {
                    "last_affected": "0.2.8"
                },
                {
                    "introduced": "0.2.10"
                },
                {
                    "last_affected": "0.2.10"
                },
                {
                    "introduced": "0.2.11"
                },
                {
                    "last_affected": "0.2.11"
                },
                {
                    "introduced": "0.2.12"
                },
                {
                    "last_affected": "0.2.12"
                },
                {
                    "introduced": "0.2.13"
                },
                {
                    "last_affected": "0.2.13"
                },
                {
                    "introduced": "0.2.15"
                },
                {
                    "last_affected": "0.2.15"
                },
                {
                    "introduced": "0.2.16"
                },
                {
                    "last_affected": "0.2.16"
                },
                {
                    "introduced": "0.2.17"
                },
                {
                    "last_affected": "0.2.17"
                },
                {
                    "introduced": "0.2.19"
                },
                {
                    "last_affected": "0.2.19"
                },
                {
                    "introduced": "0.2.20"
                },
                {
                    "last_affected": "0.2.20"
                }
            ]
        }
    ],
    "cwe_ids": [
        "CWE-400",
        "CWE-404"
    ]
}
References

Affected packages

Git / github.com/lm-sys/fastchat

Affected ranges

Type
GIT
Repo
https://github.com/lm-sys/fastchat
Events
Introduced
074f0b18155a81158dacbcba7db68807d14cb471
Fixed
c9e84b89c91d45191dc24466888de526fa04cf33
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0.2.1"
        },
        {
            "last_affected": "0.2.1"
        },
        {
            "introduced": "0.2.3"
        },
        {
            "last_affected": "0.2.3"
        },
        {
            "introduced": "0.2.5"
        },
        {
            "last_affected": "0.2.5"
        },
        {
            "introduced": "0.2.9"
        },
        {
            "last_affected": "0.2.9"
        },
        {
            "introduced": "0.2.14"
        },
        {
            "last_affected": "0.2.14"
        },
        {
            "introduced": "0.2.18"
        },
        {
            "last_affected": "0.2.18"
        },
        {
            "introduced": "0.2.21"
        },
        {
            "last_affected": "0.2.21"
        },
        {
            "introduced": "0.2.22"
        },
        {
            "last_affected": "0.2.22"
        },
        {
            "introduced": "0.2.23"
        },
        {
            "last_affected": "0.2.23"
        },
        {
            "introduced": "0.2.24"
        },
        {
            "last_affected": "0.2.24"
        },
        {
            "introduced": "0.2.25"
        },
        {
            "last_affected": "0.2.25"
        },
        {
            "introduced": "0.2.26"
        },
        {
            "last_affected": "0.2.26"
        },
        {
            "introduced": "0.2.27"
        },
        {
            "last_affected": "0.2.27"
        },
        {
            "introduced": "0.2.28"
        },
        {
            "last_affected": "0.2.28"
        },
        {
            "introduced": "0.2.29"
        },
        {
            "last_affected": "0.2.29"
        },
        {
            "introduced": "0.2.30"
        },
        {
            "last_affected": "0.2.30"
        },
        {
            "introduced": "0.2.31"
        },
        {
            "last_affected": "0.2.31"
        },
        {
            "introduced": "0.2.32"
        },
        {
            "last_affected": "0.2.32"
        },
        {
            "introduced": "0.2.33"
        },
        {
            "last_affected": "0.2.33"
        },
        {
            "introduced": "0.2.34"
        },
        {
            "last_affected": "0.2.34"
        },
        {
            "introduced": "0.2.35"
        },
        {
            "last_affected": "0.2.35"
        },
        {
            "introduced": "0.2.36"
        },
        {
            "last_affected": "0.2.36"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

0.*
0.2.1
0.2.14
0.2.18
0.2.21
0.2.22
0.2.23
0.2.24
0.2.25
0.2.26
0.2.27
0.2.28
0.2.29
0.2.3
0.2.30
0.2.31
0.2.32
0.2.33
0.2.34
0.2.35
0.2.36
0.2.5
0.2.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-6607.json"