VulnSocial

CVE-2026-25224Disclosure(fastify / fastify)

LOWCVSS 3.7 · LOW

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch fastify fastify systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Fastify is a fast and low overhead web framework, for Node.js. Prior to version 5.7.3, a denial-of-service vulnerability in Fastify’s Web Streams response handling can allow a remote client to exhaust server memory. Applications that return a ReadableStream (or Response with a Web Stream body) via reply.send() are impacted. A slow or non-reading client can trigger unbounded buffering when backpressure is ignored, leading to process crashes or severe degradation. This issue has been patched in version 5.7.3.

fastify CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Patch / fix
Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-770

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • fastify

Threat summary

  • Patch or workaround signal is available
  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 2 signals
  • Technical details provided in 3 signals
  • Disclosure: 2 classified signals
  • Peaked 1d ago at 2 mentions (2026-02-03); latest day: 1
  • 3 total mentions across 2 days

Affected systems

Vendors
fastify
Products
fastify

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-02-03: 2Mentions · 2026-02-04: 1Patch / Workaround · 2026-02-03: 2Technical Details · 2026-02-03: 2Technical Details · 2026-02-04: 102-0302-04
Signal classification2 categories
Disclosure
266.7%
Patch
133.3%
Referenced assets4 URLs
Classification over time
DateTotalLabels
2026-02-032
Disclosure1Patch1
2026-02-041
Disclosure1
Full discourse3 posts
  • CVE@CVEnew
    Disclosure

    CVE-2026-25224 Fastify is a fast and low overhead web framework, for Node.js. Prior to version 5.7.3, a denial-of-service vulnerability in Fastify’s Web Streams response handling ca… https://www.cve.org/CVERecord?id=CVE-2026-25224

    Post summary

    Fastify versions before 5.7.3 contain a denial‑of‑service vulnerability in Web Streams response handling, which is addressed in the 5.7.3 release.

    00020316
    56.5K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-25224 Fastify Web Streams Denial-of-Service Vulnerability Prior to Vers... https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-25224 Customizable Vulnerability Alerts: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=4

    Post summary

    The tweet announces a new DoS vulnerability (CVE-2026-25224) affecting Fastify Web Streams, providing only a link to a vulnerability detail page without further technical or exploit information.

    0000060
    4.0K followersView on X
  • Volerion@VolerionSec
    Patch

    🚨 CVE-2026-25224: Remote clients can crash Fastify servers by flooding memory when Web Stream responses are used. Upgrade to 5.7.3 or avoid Web Streams until patched. Details ➡️ https://volerion.com/vulnerabilities/CVE-2026-25224 #Fastify #NodeJS #infosec

    Post summary

    CVE-2026-25224 causes Fastify servers to crash via memory flooding when using Web Stream responses; upgrading to version 5.7.3 or avoiding Web Streams is the advised mitigation.

    0000048
    51 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appfastifyfastify-node.js-

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