Vulnerability details
CVE-2026-62857
fedify-dev fedify
Fedify: Server-Side Request Forgery in getNodeInfo() Allows Access to Internal Network Resources
CVSS 4.0
8.8High
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.8High | 4.0 | CVEProject cvelistV5 (CNA) (GitHub_M) | 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 |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| fedify-dev | fedify | >= 1.10.0, < 1.10.12 | CVEProject cvelistV5 (CNA) |
| fedify-dev | fedify | >= 1.2.0, < 1.9.13 | CVEProject cvelistV5 (CNA) |
| fedify-dev | fedify | >= 2.0.0, < 2.0.22 | CVEProject cvelistV5 (CNA) |
| fedify-dev | fedify | >= 2.1.0, < 2.1.18 | CVEProject cvelistV5 (CNA) |
| fedify-dev | fedify | >= 2.2.0, < 2.2.7 | CVEProject cvelistV5 (CNA) |
| fedify-dev | fedify | >= 2.3.0, < 2.3.2 | CVEProject cvelistV5 (CNA) |
References and advisories
2- https://github.com/fedify-dev/fedify/releases/tag/2.3.2 x_refsource_MISC
- https://github.com/fedify-dev/fedify/security/advisories/GHSA-hqph-j65v-8cq5 x_refsource_CONFIRM
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Details
- Published
- 2026-08-07
- Last updated
- 2026-08-08
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.42%
Probability of exploitation in 30 days
36.7%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Proof of concept
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-918Server-Side Request Forgery (SSRF)