Vulnerability · Published Aug 6, 2026 · Assigned by GitHub_M

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

High 8.8

In plain English

A high-severity server-side request forgery in fedify from fedify-dev. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS 4.0)8.8High

Exploit odds (30 days)0.4%top 63.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
fedify-dev	fedify	>= 1.2.0, < 1.9.13>= 1.10.0, < 1.10.12>= 2.0.0, < 2.0.22>= 2.1.0, < 2.1.18>= 2.2.0, < 2.2.7>= 2.3.0, < 2.3.2

Weakness: CWE-918 · 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

References

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