high8.8
CVE-2026-44293
protobuf.js: Code injection through bytes field defaults in generated toObject code
Impact
protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs generated JavaScript for toObject conversion could include an unsafe expression derived from a schema-controlled bytes field default value. A crafted descriptor with a non-string default value for a bytes field could cause attacker-controlled code to be emitted into the generated conversion function. This vulnerability is fixed in 7.5.6 and 8.0.2.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | protobufjs | <= 7.5.5 | 7.5.6 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Protobufjs Project | Protobufjs | before 7.5.6 from 8.0.0 before 8.0.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-66ff-xgx4-vchm
- https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-66ff-xgx4-vchm
- https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v7.5.6
- https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v8.0.2
- https://access.redhat.com/errata/RHSA-2026:26090
- https://access.redhat.com/errata/RHSA-2026:26234
- https://access.redhat.com/errata/RHSA-2026:29795
- https://access.redhat.com/errata/RHSA-2026:34160
- https://access.redhat.com/errata/RHSA-2026:34374
- https://access.redhat.com/errata/RHSA-2026:37186
- https://access.redhat.com/errata/RHSA-2026:37385
- https://access.redhat.com/errata/RHSA-2026:37628
- https://access.redhat.com/errata/RHSA-2026:54555
- https://access.redhat.com/errata/RHSA-2026:57487
- https://access.redhat.com/errata/RHSA-2026:60520
- https://access.redhat.com/security/cve/CVE-2026-44293
- https://bugzilla.redhat.com/show_bug.cgi?id=2477104
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44293.json