CVE-2026-42290 json
protobufjs-cli: OS Command Injection
published 5mo ago modified last mo. also EUVD-2026-29996 , GHSA-f84p-cvgm-xgjj
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 2%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm protobufjs-cli 1.2.1, 2.0.2
- protobufjs_project protobufjs-cli 1.2.1, 2.0.2
Is CVE-2026-42290 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 5mo ago
Exploit prediction
0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | protobufjs-cli | <1.2.1 >=2.0.0, <2.0.2 |
1.2.1 2.0.2 |
Affected products
- protobufjs protobuf.js
Classification
- Weakness
-
- CWE-78 Improper Neutralization of Special Elements used in an OS Command
References
-
github.com
/protobufjs/protobuf.js/security/advisories/GHSA-f84p-cvgm-xgjj
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-42290
advisory
-
github.com
/protobufjs/protobuf.js
package
-
github.com
/protobufjs/protobuf.js/releases/tag/protobufjs-cli-v1.2.1
web
-
github.com
/protobufjs/protobuf.js/releases/tag/protobufjs-cli-v2.0.2
web
Sources
- CVE List CVE-2026-42290
- GitHub Advisory GHSA-f84p-cvgm-xgjj
- NVD CVE-2026-42290
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.