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CVE PROGRAM SOURCE RECORD5.3 Medium

CVE-2026-59877

protobufjs: Denial of Service via infinite loop in .proto option parsing

Description

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.6.5 and 8.6.6, protobufjs parsed option names by advancing through schema tokens until reaching an = token without checking for end of input, so a crafted .proto schema that opens an option declaration and ends prematurely can cause parse, Root.load, or Root.loadSync to loop indefinitely. This issue is fixed in versions 7.6.5 and 8.6.6.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

protobufjs protobuf.js

  • >= 7.5.0, < 7.6.5affected
  • >= 8.0.0, < 8.6.6affected

References