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CVE-2026-29793

30
FAUCET Score

CVE-2026-29793 is a critical vulnerability affecting Feathersjs versions 5.0.0 through 5.0.41, where Socket.IO clients can inject arbitrary JavaScript objects as the 'id' argument, which are then directly used in MongoDB queries without proper validation. This network-based attack, with low complexity, enables unauthenticated attackers to execute arbitrary database operations, resulting in a critical impact on data confidentiality, integrity, and availability (CVSS 9.8). While the vulnerability is severe, there is currently no evidence of active exploitation, public exploit code, or significant community discussion. Organizations using affected Feathersjs versions should upgrade to 5.0.42 or later to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.0.0, < 5.0.42CPE matchmatch criteria
cpe:2.3:a:feathersjs:feathers:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 4.0

9.3CRITICAL

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.46%
Probability of exploitation in next 30 days
EPSS Percentile
37.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0046 is in the 15th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

npmpatch availablevia ghsa
Product: @feathersjs/mongodbFixed in: 5.0.42

Vendor Advisories (1)

npmGHSA-p9xr-7p9p-gpqxcritical

Feathers has a NoSQL Injection via WebSocket id Parameter in MongoDB Adapter

Mar 10, 2026

References

github.com / feathersjs/feathers/security/advisories/GHSA-p9xr-7p9p-gpqx
Vendor Advisory