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CVE-2026-62857— Fedify: Server-Side Request Forgery in getNodeInfo() Allows Access to Internal Network Resources

Quick assessment

Affected
fedify-dev fedify
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.

Fedify是Fedify组织的一款服务器应用框架。 Fedify 1.2.0版本至1.9.13之前版本、1.10.0版本至1.10.12之前版本、2.0.0版本至2.0.22之前版本、2.1.0版本至2.1.18之前版本、2.2.0版本至2.2.7之前版本和2.3.0版本至2.3.2之前版本存在服务端请求伪造漏洞，该漏洞源于getNodeInfo()函数在处理/.well-known/nodeinfo中的links[].href参数时未进行scheme、redirect或private-address验

CVSS 8.8 · High EPSS 0.42% · P34

Possible ATT&CK Techniques 1 AI

T1110 · Brute Force

Affected Version Matrix 6

VendorProduct Version RangeStatus
fedify-dev fedify >= 1.2.0, < 1.9.13 affected
>= 1.10.0, < 1.10.12 affected
>= 2.0.0, < 2.0.22 affected
>= 2.1.0, < 2.1.18 affected
>= 2.2.0, < 2.2.7 affected
>= 2.3.0, < 2.3.2 affected
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I. Basic Information for CVE-2026-62857

Vulnerability Information
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Vulnerability Title
Fedify: Server-Side Request Forgery in getNodeInfo() Allows Access to Internal Network Resources
Source: CVE Program / CVE List V5
Vulnerability Description
Fedify is a TypeScript library for building federated server apps powered by ActivityPub. From version 1.2.0 through the affected 1.9, 1.10, 2.0, 2.1, 2.2, and 2.3 maintenance lines, getNodeInfo() follows an attacker-controlled links[].href value from /.well-known/nodeinfo without scheme, redirect, or private-address validation, allowing requests to loopback, link-local, cloud metadata, and private-network services and returning their response bodies. This issue is fixed in versions 1.9.13, 1.10.12, 2.0.22, 2.1.18, 2.2.7, and 2.3.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA: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
Fedify 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fedify是Fedify组织的一款服务器应用框架。 Fedify 1.2.0版本至1.9.13之前版本、1.10.0版本至1.10.12之前版本、2.0.0版本至2.0.22之前版本、2.1.0版本至2.1.18之前版本、2.2.0版本至2.2.7之前版本和2.3.0版本至2.3.2之前版本存在服务端请求伪造漏洞，该漏洞源于getNodeInfo()函数在处理/.well-known/nodeinfo中的links[].href参数时未进行scheme、redirect或private-address验
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
fedify-dev fedify >= 1.2.0, < 1.9.13 -

II. Public POCs for CVE-2026-62857

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 11235 chars
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In-depth vulnerability mechanism
Trigger conditions & impact
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POC zip download
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III. Intelligence Information for CVE-2026-62857

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Vendor Advisories for CVE-2026-62857 (1)

Vendor Pages for CVE-2026-62857 (1)

IV. Related Vulnerabilities

Same product: fedify
Same vendor: fedify-dev
Same weakness: CWE-918

V. Comments for CVE-2026-62857

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