CVE•Published 2026-04-18•Modified 2026-09-09•1 article on news•6 live references•NVD data

CVE-2026-41242Protobufjs_project · Protobufjs

Vulnerability data via NVD (ingested)

CVSS v3.1

9.8

CRITICAL

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

EPSS percentile

Exploit Prediction Scoring System · top 47% of all CVEs

Weaknesses (CWE)

CWE-94Improper Control of Generation of Code ('Code Injection')

Description

protobufjs compiles protobuf definitions into JavaScript (JS) functions. In versions prior to 8.0.1 and 7.5.5, attackers can inject arbitrary code in the "type" fields of protobuf definitions, which will then execute during object decoding using that definition. Versions 8.0.1 and 7.5.5 patch the issue.

Timeline

Published 2026-04-18

Modified 2026-09-09

External references

NVD MITRE Exploit-DB GitHub PoC trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-41242

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Protobufjs Project Protobufjs"

All exposed Protobufjs Project Protobufjs instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Protobufjs"

HTTP body or banner mentions "Protobufjs" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-41242