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CVE-2026-79913— Cloudreve: SSRF guard bypass: checkIP does not decode IPv6-transition wrappers (NAT64, IPv4-compatible, 6to4) reaching internal and cloud-metadata addresses

一分钟漏洞结论

影响对象
cloudreve cloudreve
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

Cloudreve is a self-hosted file management and sharing system. Prior to 4.18.0, the ValidateExternalURL server-side request forgery guard in pkg/request/ssrf.go passes resolved addresses to checkIP without decoding NAT64, IPv4-compatible, and 6to4 IPv4-in-IPv6

CVSS 6.5 · Medium
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一、 漏洞 CVE-2026-79913 基础信息

漏洞信息

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Vulnerability Title
Cloudreve: SSRF guard bypass: checkIP does not decode IPv6-transition wrappers (NAT64, IPv4-compatible, 6to4) reaching internal and cloud-metadata addresses
来源: CVE Program / CVE List V5
Vulnerability Description
Cloudreve is a self-hosted file management and sharing system. Prior to 4.18.0, the ValidateExternalURL server-side request forgery guard in pkg/request/ssrf.go passes resolved addresses to checkIP without decoding NAT64, IPv4-compatible, and 6to4 IPv4-in-IPv6 transition forms. An authenticated user with remote-download access can provide SrcUri through RemoteDownloadTask.createDownloadTask so a wrapper embedding a loopback, private, link-local, or cloud metadata IPv4 address is classified as public and fetched, exposing internal service responses and cloud instance credentials. IPv4-mapped IPv6 addresses remain blocked because Go converts that form with net.IP.To4. This issue is fixed in version 4.18.0.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
cloudreve cloudreve < 4.18.0 -

二、漏洞 CVE-2026-79913 的公开POC

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三、漏洞 CVE-2026-79913 的情报信息

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CVE-2026-79913 补丁与修复 (1)

CVE-2026-79913 其他参考 (1)

CVE-2026-79913 其他参考 (1)

同批安全公告 · cloudreve · 2026-09-22 · 共 3 条

CVE-2026-77633 7.1 HIGH Cloudreve: Storage-quota TOCTOU race allows quota bypass and storage-based denial of servi
CVE-2026-77637 3.8 LOW Cloudreve: Privilege Scope Bypass: State-Mutating Admin Operations Accessible via Read-Onl

IV. Related Vulnerabilities

Same product: cloudreve
Same vendor: cloudreve
Same weakness: CWE-918

V. Comments for CVE-2026-79913

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