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Vulnerabilities

Vulnerability · CVE-2026-41242

protobufjs compiles protobuf definitions into JavaScript (JS) functions.

Published Apr 18, 2026 · catalog updated Sep 9, 2026 · protobufjs project

Check if you run it

No confirmed exploitation is on record for CVE-2026-41242. EPSS is 0.99%. Act only if a listed version of protobufjs project is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.99%
Remediation
Advisory link
Affected products
cpe protobufjs project/protobufjs

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe protobufjs project/protobufjs8.0.0

How to fix CVE-2026-41242

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-41242. EPSS is 0.99%. Act only if a listed version of protobufjs project is installed.

Which versions are affected?

Compare what you have installed with protobufjs project/protobufjs 8.0.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-94: Code Injection. EPSS 0.99%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 18, 2026 · NIST NVD

    Detected

    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.

  2. Sep 9, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-41242

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-41242

    30-day exploitation probability 1.0%

    first.org
  • NIST NVDVulnerability recordCVE-2026-41242

    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 an

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.