Update npm package protobufjs to v7.6.5 [SECURITY]

[hash-dependencies]

This PR contains the following updates:

Package	Change	Age	Confidence
protobufjs	7.6.4 → 7.6.5

---

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

CVE-2026-59877 / GHSA-j3f2-48v5-ccww

More information

Details

Summary

protobufjs parsed option names by advancing through schema tokens until it reached an = token, without checking for end of input. A crafted .proto schema that opens an option declaration but ends prematurely could cause the option parser to loop without ever terminating.

This affects the reflection parsing path (parse, Root.load, Root.loadSync).

Impact

An attacker who can provide or influence .proto schema text parsed by an application may be able to cause the parsing call to never return. Because Node.js is single-threaded, the blocked event loop prevents all other work in the process, resulting in a denial of service that persists until the process is externally terminated.

Applications that only encode or decode protobuf binary data with trusted schemas are not directly affected.

Preconditions

• The application must parse .proto schema text influenced by an attacker.
• The schema must be parsed through APIs such as parse, Root.load, or Root.loadSync.
• The crafted input must begin an option declaration that ends before its = assignment.

Workarounds

Do not parse .proto schemas from untrusted sources with affected versions. If untrusted schema text must be accepted, isolate parsing in a process or worker that can be safely terminated and bound it with a timeout, so a non-returning parse call cannot deny service to the rest of the application.

Severity

• CVSS Score: 5.3 / 10 (Medium)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

• https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-j3f2-48v5-ccww
• https://nvd.nist.gov/vuln/detail/CVE-2026-59877
• https://github.com/protobufjs/protobuf.js/pull/2352
• https://github.com/protobufjs/protobuf.js/commit/10fba6d54815ceecca8a06b9a6db490c8f5d2217
• https://github.com/protobufjs/protobuf.js/commit/fa5c73add738ceb471e74da8cc2f3727c3d0a69f
• https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v7.6.5
• https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v8.6.6
• https://github.com/advisories/GHSA-j3f2-48v5-ccww

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

---

Release Notes

protobufjs/protobuf.js (protobufjs)

v7.6.5: protobufjs: v7.6.5

Compare Source

Bug Fixes

• handle EOF during options parsing (#​2352) (#​2356) (10fba6d)

---

Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • "before 4am every weekday,every weekend"

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate.

[cursor]

PR Summary

Low Risk
Patch-level dependency override with no app logic changes; risk is limited to protobuf schema parsing behavior in transitive consumers.

Overview
Pins the npm protobufjs override from 7.6.4 to 7.6.5 so the resolved transitive dependency includes the fix for CVE-2026-59877 (infinite loop when parsing malformed .proto option declarations).

The lockfile is refreshed accordingly; there are no application source changes.

^{Reviewed by Cursor Bugbot for commit 17f96fb. Bugbot is set up for automated code reviews on this repo. Configure here.}

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit 17f96fb. Configure here.}

[cursor]

Incomplete security override update

High Severity

The protobufjs override was bumped to 7.6.5, but package-lock.json still resolves @earendil-works/pi-coding-agent/node_modules/protobufjs to vulnerable 7.6.4. With npm ci in the Dockerfile, installs can fail as out-of-sync, or keep the unpatched package, so CVE-2026-59877 remains unfixed.

 

^{Reviewed by Cursor Bugbot for commit 17f96fb. Configure here.}