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CVE-2023-25576

23
FAUCET Score

CVE-2023-25576 is a denial-of-service vulnerability affecting the @fastify/multipart plugin for Fastify, specifically versions prior to 7.4.1 (for Fastify v4.x) and 6.0.1 (for Fastify v3.x). The vulnerability arises from the multipart body parser accepting an unlimited number of file, field, or empty parts, leading to resource exhaustion. With a CVSS score of 7.5 (HIGH), this vulnerability can be exploited remotely with low attack complexity, resulting in high availability impact. There are no known workarounds, and while patches are available, there is currently no evidence of active exploitation, public exploit code, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.0.1CPE matchmatch criteria
cpe:2.3:a:fastify:fastify-multipart:*:*:*:*:*:fastify:*:*
>= 7.0.0, < 7.4.1CPE matchmatch criteria
cpe:2.3:a:fastify:fastify-multipart:*:*:*:*:*:fastify:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.46%
Probability of exploitation in next 30 days
EPSS Percentile
70.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0146 is in the 52nd percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: @fastify/multipartFixed in: 6.0.1
npmpatch availablevia ghsa
Product: @fastify/multipartFixed in: 7.4.1

Vendor Advisories (1)

npmGHSA-hpp2-2cr5-pf6ghigh

Denial of service due to unlimited number of parts

Feb 14, 2023

References

github.com / fastify/fastify-multipart/commit/85be81bedf5b29cfd9fe3efc30fb5a17173c1297
PatchThird Party Advisory
github.com / fastify/fastify-multipart/releases/tag/v6.0.1
Release NotesThird Party Advisory
github.com / fastify/fastify-multipart/releases/tag/v7.4.1
Release NotesThird Party Advisory
github.com / fastify/fastify-multipart/security/advisories/GHSA-hpp2-2cr5-pf6g
Third Party Advisory
hackerone.com / reports/1816195
Permissions RequiredThird Party Advisory