Review reviewCritical

CVE-2026-41242

protobufjs protobuf.js, Red Hat Developer Hub 1.8, Red Hat Developer Hub 1.9

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.

CVSS
9.4
EPSS
0.74%
51.2% percentile
CISA KEV
Not listed
Published
2026.04.19
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.74%
Technical severityCVSS 9.4

Vulnerability overview

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.

Affected product and versions

Product
protobufjs protobuf.js, Red Hat Developer Hub 1.8, Red Hat Developer Hub 1.9
Affected versions
>= < 7.5.5, >= >= 8.0.0-experimental, < 8.0.1, < 7.5.5, 8.0.0
Fixed versions
7.5.5

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that protobufjs protobuf.js, Red Hat Developer Hub 1.8, Red Hat Developer Hub 1.9 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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
CWE
CWE-94