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chore(deps): bump net-imap from 0.6.3 to 0.6.4#32

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chore(deps): bump net-imap from 0.6.3 to 0.6.4#32
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dependabot/bundler/net-imap-0.6.4

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@dependabot dependabot Bot commented on behalf of github May 4, 2026

Bumps net-imap from 0.6.3 to 0.6.4.

Release notes

Sourced from net-imap's releases.

v0.6.4

What's Changed

🔒 Security

This release contains fixes for multiple vulnerabilities concerning STARTTLS stripping, argument validation, and denial of service attacks.

[!WARNING] ruby/net-imap#664 fixes a STARTTLS stripping vulnerability (GHSA-vcgp-9326-pqcp). Without this fix, a man-in-the-middle attacker can cause Net::IMAP#starttls to return "successfully", without starting TLS.

[!IMPORTANT] Argument validation is significantly improved. Several injection vulnerabilities have been fixed: ruby/net-imap#657 fixes CRLF/command/argument injection via Symbol arguments (GHSA-75xq-5h9v-w6px). ruby/net-imap#658 fixes CRLF/command/argument injection via the attr argument to #store/#uid_store (GHSA-hm49-wcqc-g2xg) ruby/net-imap#659 fixes CRLF/command/argument injection via the storage_limit argument to #setquota (GHSA-hm49-wcqc-g2xg). ruby/net-imap#660 fixes CRLF/command injection via RawData (GHSA-hm49-wcqc-g2xg):

  • #search and #uid_search send criteria as raw data, when it is a String
  • #fetch and #uid_fetch send attr as raw data, when it is a String. When attr is an Array, its String members are sent as raw data.

[!CAUTION] RawData does not defend against other forms of argument injection! It is an intentionally low-level API.

[!NOTE] Two denial of service vulnerabilities have been addressed. These are generally only relevant when connecting to an untrusted hostile server (or without TLS).

ruby/net-imap#642 fixes quadratic time complexity when reading large responses containing many string literals (GHSA-q2mw-fvj9-vvcw). ruby/net-imap#654 adds a configurable max_iterations count for SCRAM-* authentication (GHSA-87pf-fpwv-p7m7).

The default ScramAuthenticator#max_iterations is 2**31 - 1 (max 32-bit signed int), which was already OpenSSL's maximum value. It provides no protection against hostile servers unless it is explicitly set to a lower value by the user.

Breaking Changes

  • ResponseReader memoizes Config#max_response_size in ruby/net-imap#642. Changes to #max_response_size now take effect once per response, not on every IO#read. NOTE: It is not expected that this will affect any current usage. See the PR for details.

Added

Fixed

... (truncated)

Commits
  • 3e49067 🔖 Bump version to 0.6.4
  • 0ede4c4 🔀 Merge pull request #664 from ruby/security/STARTTLS-stripping
  • 51ae360 ♻️ Add command response handler before command is sent
  • 24d5c77 🔒🥅 Handle tagged "OK" to incomplete command
  • 62eea6f 🔒🥅 Ensure STARTTLS tagged response was handled
  • 46636ca ❌🔒 Add failing test for STARTTLS stripping
  • e3b0105 ✅♻️ Inline current STARTLS stripping test
  • be32e71 📚 Improve documentation of RawData arguments
  • 47c7218 🐛 Validate RawData and wait to continue literals
  • 0ec4fd3 🥅 Validate #setquota storage limit argument
  • Additional commits viewable in compare view

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Bumps [net-imap](https://github.com/ruby/net-imap) from 0.6.3 to 0.6.4.
- [Release notes](https://github.com/ruby/net-imap/releases)
- [Commits](ruby/net-imap@v0.6.3...v0.6.4)

---
updated-dependencies:
- dependency-name: net-imap
  dependency-version: 0.6.4
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot added dependencies Pull requests that update a dependency file ruby Pull requests that update ruby code labels May 4, 2026
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github-actions Bot commented May 4, 2026

📦 Dependency Security Check

✅ No known vulnerabilities found.

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No vulnerabilities found

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github-actions Bot commented May 4, 2026

🔒 Brakeman Security Scan

  • Total warnings: 0
  • High confidence: 0

✅ No high confidence issues found.

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github-actions Bot commented May 4, 2026

🔍 Semgrep Static Analysis

Severity Count
Errors 0
Critical (HIGH confidence) 0
Warnings 0

✅ No issues found.

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Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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github-actions Bot commented May 4, 2026

🔐 Security Scan Summary

Static Analysis (SAST)

Check Status
Brakeman ✅ success
Dependencies ✅ success
Semgrep ✅ success
Secrets ✅ success

Dynamic Analysis (DAST)

Check Status
SSRF Protection ✅ success
Authentication ✅ success
SQL Injection ✅ success

✅ All security checks passed!

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