Fedify affected by resource exhaustion caused by unbounded redirect following during remote key/document resolution
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.
Summary
Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to 1.9.6, 1.10.5, 2.0.8, and 2.1.1, @fedify/fedify follows HTTP redirects recursively in its remote document loader and authenticated document loader without enforcing a maximum redirect count or visited-URL loop detection. An attacker who controls a remote ActivityPub key or actor URL can force a server using Fedify to make repeated outbound requests from a single inbound request, leading to resource consumption and denial of service. This vulnerability is fixed in 1.9.6, 1.10.5, 2.0.8, and 2.1.1.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| @fedify | fedify | before 1.9.6; 1.10.0 to before 1.10.5; 2.0.0 to before 2.0.8; 2.1.0 to before 2.1.1 | 1.9.6, 1.10.5, 2.0.8, 2.1.1 | Patch available | CNA |
| @fedify | vocab-runtime | before 2.0.8; 2.1.0 to before 2.1.1 | 2.0.8, 2.1.1 | Patch available | CNA |
| — | @fedify/fedify (npm) | before 1.9.6 | 1.9.6 | Patch available | GHSA-gm9m-gwc4-hwgp |
| — | @fedify/vocab-runtime (npm) | before 2.0.8 | 2.0.8 | Patch available | GHSA-gm9m-gwc4-hwgp |
| — | @fedify/vocab-runtime (npm) | 2.1.0 to before 2.1.1 | 2.1.1 | Patch available | GHSA-gm9m-gwc4-hwgp |
| — | @fedify/fedify (npm) | 1.10.0 to before 1.10.5 | 1.10.5 | Patch available | GHSA-gm9m-gwc4-hwgp |
| — | @fedify/fedify (npm) | 2.0.0 to before 2.0.8 | 2.0.8 | Patch available | GHSA-gm9m-gwc4-hwgp |
| — | @fedify/fedify (npm) | 2.1.0 to before 2.1.1 | 2.1.1 | Patch available | GHSA-gm9m-gwc4-hwgp |
- fedify Vendor@fedify Affected before 1.9.6; 1.10.0 to before 1.10.5; 2.0.0 to before 2.0.8; 2.1.0 to before 2.1.1 Fixed in 1.9.6, 1.10.5, 2.0.8, 2.1.1 Patch available CNA
- vocab-runtime Vendor@fedify Affected before 2.0.8; 2.1.0 to before 2.1.1 Fixed in 2.0.8, 2.1.1 Patch available CNA
- @fedify/fedify (npm) Vendor— Affected before 1.9.6 Fixed in 1.9.6 Patch available GHSA-gm9m-gwc4-hwgp
- @fedify/vocab-runtime (npm) Vendor— Affected before 2.0.8 Fixed in 2.0.8 Patch available GHSA-gm9m-gwc4-hwgp
- @fedify/vocab-runtime (npm) Vendor— Affected 2.1.0 to before 2.1.1 Fixed in 2.1.1 Patch available GHSA-gm9m-gwc4-hwgp
- @fedify/fedify (npm) Vendor— Affected 1.10.0 to before 1.10.5 Fixed in 1.10.5 Patch available GHSA-gm9m-gwc4-hwgp
- @fedify/fedify (npm) Vendor— Affected 2.0.0 to before 2.0.8 Fixed in 2.0.8 Patch available GHSA-gm9m-gwc4-hwgp
- @fedify/fedify (npm) Vendor— Affected 2.1.0 to before 2.1.1 Fixed in 2.1.1 Patch available GHSA-gm9m-gwc4-hwgp
CPE configurations NVD · 2
Remediation
- Fix · CNA fedify (@fedify) Fixed in 1.9.6, 1.10.5, 2.0.8, 2.1.1
- Fix · CNA vocab-runtime (@fedify) Fixed in 2.0.8, 2.1.1
- Fix · GHSA-gm9m-gwc4-hwgp @fedify/fedify (npm) Fixed in 1.9.6 Advisory →
- Fix · GHSA-gm9m-gwc4-hwgp @fedify/vocab-runtime (npm) Fixed in 2.0.8 Advisory →
- Fix · GHSA-gm9m-gwc4-hwgp @fedify/vocab-runtime (npm) Fixed in 2.1.1 Advisory →
- Fix · GHSA-gm9m-gwc4-hwgp @fedify/fedify (npm) Fixed in 1.10.5 Advisory →
- Fix · GHSA-gm9m-gwc4-hwgp @fedify/fedify (npm) Fixed in 2.0.8 Advisory →
- Fix · GHSA-gm9m-gwc4-hwgp @fedify/fedify (npm) Fixed in 2.1.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-34148
- 2026-10-03 Alias added: GHSA-gm9m-gwc4-hwgp
- 2026-10-25 EPSS moved to the below the 50th percentile
References
Sources
- CVE-2026-34148 · CVE Program
- CVE-2026-34148 · NVD
- FIRST EPSS
- GHSA-gm9m-gwc4-hwgp · GitHub Advisory Database · CC BY 4.0
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