CVE-2026-34148

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 57% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
EPSS PROB
0.7%
EPSS %ILE
50th
KEV
Not listed

Published

April 6, 2026

Last Modified

April 25, 2026

Advisory Details (5)

Auto-updated Jun 11, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github.
githubMentions a patch (unverified)🟡 PoC Available

Resource exhaustion caused by unbounded redirect following during remote key/document resolution · Advisory · fedify-dev/fedify · GitHub

https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp
github_release Patch Available

Fedify 2.1.1

Patch available: fedify-dev/fedify 2.1.1

https://github.com/fedify-dev/fedify/releases/tag/2.1.1
github_release Patch Available

Fedify 2.0.8

Patch available: fedify-dev/fedify 2.0.8

https://github.com/fedify-dev/fedify/releases/tag/2.0.8
github_release Patch Available

Fedify 1.9.6

Patch available: fedify-dev/fedify 1.9.6

https://github.com/fedify-dev/fedify/releases/tag/1.9.6
github_release Patch Available

Fedify 1.10.5

Patch available: fedify-dev/fedify 1.10.5

https://github.com/fedify-dev/fedify/releases/tag/1.10.5

Vendor Advisories for CVE-2026-34148(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(2 across 1 ecosystem)
npm(2)
PackageVulnerable rangeFix by version rangeDependents
@fedify/fedify2.1.0
  • every version up to 1.9.6: fixed in 1.9.6
  • 1.10.0 up to 1.10.5: fixed in 1.10.5
  • 2.0.0 up to 2.0.8: fixed in 2.0.8
  • 2.1.0 up to 2.1.1: fixed in 2.1.1
—
@fedify/vocab-runtime2.1.0
  • every version up to 2.0.8: fixed in 2.0.8
  • 2.1.0 up to 2.1.1: fixed in 2.1.1
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 27× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 183 total refreshes for this CVE.

  1. 2026-10-11 00:22 UTCOSV refresh
  2. 2026-10-10 20:00 UTCEPSS rescore
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  27. 2026-08-16 08:25 UTCEG score recompute
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Frequently asked(5)

What is CVE-2026-34148?
CVE-2026-34148 is a high vulnerability published on April 6, 2026. 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…
When was CVE-2026-34148 disclosed?
CVE-2026-34148 was first published on April 6, 2026, with the most recent update on April 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34148 actively exploited?
CVE-2026-34148 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (50th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-34148?
CVE-2026-34148 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-34148?
A fix for CVE-2026-34148 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-34148 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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