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CVE-2026-82476— Memos through 0.30.0 SSRF via Omitted CGNAT Address Range

Quick assessment

Affected
usememos memos
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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组织开源的一款轻量级的个人笔记与知识管理工具。 Usememos Memos 0.30.0及之前版本存在服务端请求伪造漏洞，该漏洞源于链接元数据获取器在服务端请求伪造（SSRF）防护中遗漏了100.64.0.0/10运营商级NAT地址范围，可能导致未经身份验证的攻击者绕过IP验证，使服务器请求该范围内的内部主机（包括云元数据服务），并读取页面标题和描述。

CVSS 5.3 · Medium EPSS 0.43% · P35

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
usememos memos ≤ 0.30.0 affected
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I. Basic Information for CVE-2026-82476

Vulnerability Information
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Vulnerability Title
Memos through 0.30.0 SSRF via Omitted CGNAT Address Range
Source: CVE Program / CVE List V5
Vulnerability Description
Memos through 0.30.0 omits the 100.64.0.0/10 carrier-grade NAT address range from SSRF protection in its link-metadata fetcher, allowing unauthenticated attackers to bypass IP validation. Attackers can make the server request internal hosts in that range including cloud metadata services and read page titles and descriptions back.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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组织开源的一款轻量级的个人笔记与知识管理工具。 Usememos Memos 0.30.0及之前版本存在服务端请求伪造漏洞，该漏洞源于链接元数据获取器在服务端请求伪造（SSRF）防护中遗漏了100.64.0.0/10运营商级NAT地址范围，可能导致未经身份验证的攻击者绕过IP验证，使服务器请求该范围内的内部主机（包括云元数据服务），并读取页面标题和描述。
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 ~ 0.30.0 -

II. Public POCs for CVE-2026-82476

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III. Intelligence Information for CVE-2026-82476

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Patches & Fixes for CVE-2026-82476 (1)

Vendor Advisories for CVE-2026-82476 (1)

Proof of Concept for CVE-2026-82476 (1)

Other References for CVE-2026-82476 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-82476

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