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CVE-2026-42261— PromptHub SSRF漏洞:IPv6绕过POST请求

CVSS 7.1 · High EPSS 0.06% · P17
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一、 漏洞 CVE-2026-42261 基础信息

漏洞信息

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Vulnerability Title
PromptHub: Authenticated SSRF via IPv6 filter bypass in `POST /api/skills/fetch-remote`
来源: 美国国家漏洞数据库 NVD
Vulnerability Description
PromptHub is an all-in-one AI toolbox for prompt, skill, and agent management. From version 0.4.9 to before version 0.5.4, apps/web/src/routes/skills.ts exposes an authenticated endpoint POST /api/skills/fetch-remote that fetches a user-supplied URL server-side and reflects the response body (up to 5 MB) back to the caller. The SSRF protection in apps/web/src/utils/remote-http.ts (isPrivateIPv6) attempts to block private/loopback destinations, but multiple alternate-but-valid IPv6 representations bypass the check. The bypasses reach any IPv4 address (loopback, RFC1918, link-local) via IPv4-mapped IPv6 in hex form, and the canonical ::1 via any representation that isn't the literal string "::1". Any authenticated user (role: user or admin) can trigger the SSRF. On deployments configured with ALLOW_REGISTRATION=true — a supported and documented configuration — this means any internet user who can register. This issue has been patched in version 0.5.4.
来源: 美国国家漏洞数据库 NVD
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
来源: 美国国家漏洞数据库 NVD
Vulnerability Type
输入验证不恰当
来源: 美国国家漏洞数据库 NVD

受影响产品

厂商产品影响版本CPE订阅
legelingPromptHub >= 0.4.9, < 0.5.4 -

二、漏洞 CVE-2026-42261 的公开POC

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三、漏洞 CVE-2026-42261 的情报信息

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IV. Related Vulnerabilities

V. Comments for CVE-2026-42261

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