go-kratos http.DefaultServeMux Fallback server.go NewServer confused deputy_CVE-2026-6993

6.9 / 10

MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P

Description

A security flaw has been discovered in go-kratos kratos up to 2.9.2. This impacts the function NewServer of the file transport/http/server.go of the component http.DefaultServeMux Fallback Handler. The manipulation results in unintended intermediary. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. The patch is identified as 0284a5bcf92b5a7ee015300ce3051baf7ae4718d. Applying a patch is advised to resolve this issue.

Basic Information

ID CVE-2026-6993

Source VulDB

Published Apr 25, 2026 at 18:30

Affected Product

Vendor go-kratos

Product kratos

Version 2.9.0

Affected Versions go-kratos kratos 2.9.0
go-kratos kratos 2.9.1
go-kratos kratos 2.9.2

CWE Classification

CWE-441

References

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    "lastseen": "",
    "description": "A security flaw has been discovered in go-kratos kratos up to 2.9.2. This impacts the function NewServer of the file transport/http/server.go of the component http.DefaultServeMux Fallback Handler. The manipulation results in unintended intermediary. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. The patch is identified as 0284a5bcf92b5a7ee015300ce3051baf7ae4718d. Applying a patch is advised to resolve this issue.",
    "published": "2026-04-25T18:30:16.160Z",
    "modified": "2026-04-25T18:30:16.160Z",
    "type": "cve",
    "title": "go-kratos http.DefaultServeMux Fallback server.go NewServer confused deputy",
    "source": "VulDB",
    "references": "https://vuldb.com/vuln/359545\nhttps://vuldb.com/vuln/359545/cti\nhttps://vuldb.com/submit/797099\nhttps://github.com/go-kratos/kratos/issues/3810\nhttps://github.com/go-kratos/kratos/pull/3814\nhttps://github.com/Yanhu007/kratos/commit/0284a5bcf92b5a7ee015300ce3051baf7ae4718d\nhttps://github.com/go-kratos/kratos/",
    "id": "CVE-2026-6993",
    "bulletinFamily": "",
    "cwe": [
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    "cvelist": null,
    "sourceData": "go-kratos kratos 2.9.0\ngo-kratos kratos 2.9.1\ngo-kratos kratos 2.9.2",
    "sourceHref": "",
    "cvss": {
        "score": 6.9,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P",
        "version": "4.0"
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        "cvssV3": {
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    "href": "",
    "category_name": "CVE",
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    "product": "kratos",
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}