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CVE-2026-71271— Memos Webhook SSRF via 0.0.0.0 Reserved-IP Bypass

Quick assessment

Affected
usememos memos
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

usememos memos是usememos团队开源的一个文档管理工具。 usememos memos 0.29.1及之前版本存在服务端请求伪造漏洞，该漏洞源于webhook URL验证函数isReservedIP()在internal/webhook/validate.go中未检查0.0.0.0/8且未调用ip.IsUnspecified()，可能导致攻击者注册http://0.0.0.0:PORT/的webhook URL绕过保留IP检查，使服务器向自身回环接口发送HTTP请求，暴露内部服务。

CVSS 8.5 · High EPSS 0.33% · P23

Affected Version Matrix 1

VendorProduct Version RangeStatus
usememos memos ≤ 0.29.1 affected
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I. Basic Information for CVE-2026-71271

Vulnerability Information
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Vulnerability Title
Memos Webhook SSRF via 0.0.0.0 Reserved-IP Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
Memos' webhook URL validation, isReservedIP (internal/webhook/validate.go), checks a candidate IP against a reservedCIDRs list that omits 0.0.0.0/8 and never calls ip.IsUnspecified — unlike the correctly implemented sibling function isInternalIP in internal/httpgetter/html_meta.go, which does.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
usememos memos 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
usememos memos是usememos团队开源的一个文档管理工具。 usememos memos 0.29.1及之前版本存在服务端请求伪造漏洞，该漏洞源于webhook URL验证函数isReservedIP()在internal/webhook/validate.go中未检查0.0.0.0/8且未调用ip.IsUnspecified()，可能导致攻击者注册http://0.0.0.0:PORT/的webhook URL绕过保留IP检查，使服务器向自身回环接口发送HTTP请求，暴露内部服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
usememos memos 0 ~ 0.29.1 -

II. Public POCs for CVE-2026-71271

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 4882 chars
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III. Intelligence Information for CVE-2026-71271

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Patches & Fixes for CVE-2026-71271 (1)

Other References for CVE-2026-71271 (1)

IV. Related Vulnerabilities

Same product: memos
Same vendor: usememos
Same weakness: CWE-918

V. Comments for CVE-2026-71271

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