How severe is CVE-2026-42290?

CVE-2026-42290 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-42290 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42290?

CVE-2026-42290 affects Protobufjs Project Protobufjs-cli. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42290?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-42290 have an EU (EUVD) identifier?

Yes. CVE-2026-42290 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29996.

When was CVE-2026-42290 published?

CVE-2026-42290 was published on 2026-05-13 and last updated on 2026-06-17.

CVE-2026-42290

CVE-2026-42290 is a high-severity vulnerability in Protobufjs Project Protobufjs-cli with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29996
Weakness: CWE-78
Affected product: Protobufjs Project Protobufjs-cli
Published: 2026-05-13
Last modified: 2026-06-17

Description

protobufjs-cli is the command line add-on for protobuf.js. Prior to 1.2.1 and 2.0.2, pbts invoked JSDoc by building a shell command string from input file paths and executing it through child_process.exec. File paths containing shell metacharacters could therefore be interpreted by the shell instead of being passed to JSDoc as plain arguments. This vulnerability is fixed in 1.2.1 and 2.0.2.

Frequently asked questions

What is CVE-2026-42290?: protobufjs-cli is the command line add-on for protobuf.js. Prior to 1.2.1 and 2.0.2, pbts invoked JSDoc by building a shell command string from input file paths and executing it through child_process.exec. File paths containing shell metacharacters could therefore be interpreted by the shell instead of being passed to JSDoc as plain arguments. This vulnerability is fixed in 1.2.1 and 2.0.2.
How severe is CVE-2026-42290?: CVE-2026-42290 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-42290 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42290?: CVE-2026-42290 affects Protobufjs Project Protobufjs-cli. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42290?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-42290 have an EU (EUVD) identifier?: Yes. CVE-2026-42290 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29996.
When was CVE-2026-42290 published?: CVE-2026-42290 was published on 2026-05-13 and last updated on 2026-06-17.

References

https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-f84p-cvgm-xgjj

Affected products (1)

cpe:2.3:a:protobufjs_project:protobufjs-cli:*:*:*:*:*:node.js:*:*

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