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8.8highHigh

CVE-2026-44293

Protobufjs Project Protobufjs

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.

Exploitation status

  • A vendor advisory or patch reference has been published.

What the metrics mean

  • It is reachable over a network, without needing local access.
  • For an attacker who can reach it, no special conditions are needed to exploit it.
  • To exploit it, an ordinary user account is needed.
  • Beyond that, no action by a user is required.

Scoring

CVSS
8.8 (v3.1)
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4
7.7
Weakness
CWE-94
Assigned by
security-advisories@github.com

Dates

Published
2026-05-13
Last modified
2026-08-28
Sources
NVD

Affected products

  • Protobufjs Project Protobufjs- 7.5.6, 8.0.0 - 8.0.2

As listed in the NVD configuration data. Not a statement about your estate.

References