Security bump clearing 3 advisories: GHSA-c4rq-3m3g-8wgx (High, CSS
selector tokenizer ReDoS), GHSA-v2fc-qm4h-8hqv (XSLT transform memory
leak), GHSA-wx95-c6cv-8532 (unchecked xmlC14NExecute return). None
exposed: loofah/rails-html-sanitizer use DOM/XPath not CSS selectors,
every app CSS selector is a compile-time literal, and campfire uses no
XSLT or XML canonicalization.
The 1.18→1.19 minor bump is a Ruby-4-support/packaging milestone —
bundled libxml2 2.13.9 / libxslt 1.1.43 are unchanged, so HTML parsing
and ActionText sanitization output are identical. Ruby floor 3.2
(campfire runs 3.4.5); all 4 locked platforms still ship.
Transitive dep via Rails/loofah (no Gemfile change). 33 commits analyzed,
0 mitigations. Verified green via full unit + system suites.
https://github.com/basecamp/37signals-hq/blob/main/upgrade-analysis/campfire-20260609-nokogiri_v1.18.10..v1.19.3.md🤖 Assisted by Claude
Security bump clearing ~11 CVEs (multipart parser differentials/DoS, Host
header validation, byte-range DoS, Forwarded injection, Rack::Static/
Directory/Sendfile disclosures). Reachable fixes (multipart uploads, AS
byte-range streaming, host parsing) apply transparently via corrective
behavior and generous new defaults; the Static/Directory/Sendfile/
Deflater CVEs are not reachable (campfire uses none of those middlewares).
No app changes required. Optional hardening noted in plan: new env knob
RACK_MULTIPART_PARSER_BYTESIZE_LIMIT (default 10 GiB) could be tuned to
campfire's real max attachment size — left at default here.
Transitive dep via Rails (no Gemfile change). 23 commits analyzed,
0 required mitigations. Verified green via full unit + system suites.
https://github.com/basecamp/37signals-hq/blob/main/upgrade-analysis/campfire-20260609-rack_v3.2.4..v3.2.6.md🤖 Assisted by Claude
Security bump for CVE-2025-61921 (ReDoS via ETag header generation). Not
exposed: sinatra reaches campfire only through resque-web, which is never
mounted — config.ru runs plain Rails, no `require "resque/server"`
anywhere, so Sinatra::Base is never defined. Dead code at runtime.
Conservative update also bumped rack-protection 4.1.1 → 4.2.1 (same
monorepo); its shipped lib is byte-identical bar the version string.
Transitive dep (no Gemfile change). 14 commits analyzed, 0 mitigations.
https://github.com/basecamp/37signals-hq/blob/main/upgrade-analysis/campfire-20260609-sinatra_v4.1.1..v4.2.1.md🤖 Assisted by Claude
Security fix for 3 stored/DOM XSS advisories in Trix:
GHSA-g9jg-w8vm-g96v (attachment attribute), GHSA-qmpg-8xg6-ph5q
(serialized attributes), GHSA-53p3-c7vp-4mcc (JSON deserialization
bypass in drag-and-drop).
EXPOSED: campfire's composer/editor use Trix for message bodies, and the
browser actually ran the hand-vendored vendor/javascript/trix.esm.min.js
pinned at 2.0.10 — which lacks the DOMPurify/isValidAttribute sanitizers.
The gem bump alone is a no-op for the browser; the real fix is
re-vendoring the ESM build:
- bump gem to 2.1.19 (Gemfile.lock)
- re-vendor vendor/javascript/trix.esm.min.js from Trix 2.1.19
(2.0.10 → 2.1.19; bundles DOMPurify 3.4.2, rangy 1.3.2)
- update importmap pin comment @2.0.10 → @2.1.19
89 commits analyzed. Verified green via full unit + system suites
(system tests drive the Trix composer via fill_in_rich_text_area).
https://github.com/basecamp/37signals-hq/blob/main/upgrade-analysis/campfire-20260609-action_text-trix_v2.1.15..v2.1.19.md🤖 Assisted by Claude
Security bump clearing 5 CVEs (CVE-2026-42245/42246/42256/42257/42258:
literal DoS, STARTTLS stripping, SCRAM DoS, command injection ×2). Not
exposed: all require acting as an IMAP client. net-imap is autoloaded by
mail only when retriever_method :imap is set; campfire configures no
retriever and has no inbound email — net/imap is never required.
Conservative update landed 0.6.4 (minor jump, dormant dep). Ruby floor
raised to >= 3.2.0; campfire runs 3.4.5. 206 commits triaged, 0
mitigations.
https://github.com/basecamp/37signals-hq/blob/main/upgrade-analysis/campfire-20260609-net-imap_v0.5.12..v0.6.4.md🤖 Assisted by Claude
Security bump for CVE-2026-41316 (High, @_init deserialization guard
bypass via def_module/def_method/def_class). Not exposed: ActionView
renders via Erubi, not Ruby's ERB class; no def_* calls or Marshal of ERB
objects anywhere — vulnerable path absent.
Transitive dep (no Gemfile change). 24 commits analyzed, 0 mitigations.
https://github.com/basecamp/37signals-hq/blob/main/upgrade-analysis/campfire-20260609-erb_v6.0.0..v6.0.4.md🤖 Assisted by Claude
Security bump for CVE-2026-45363 (High, empty-key HMAC bypass). Not
exposed: jwt reaches campfire only via web-push VAPID signing, which uses
ES256 (asymmetric ECDSA), not HMAC — the vulnerable JWA::Hmac path is
unreachable. web-push requires jwt ~> 3.0; minor bump, encode API
unchanged.
Transitive dep (no Gemfile change). 15 commits analyzed, 0 mitigations.
https://github.com/basecamp/37signals-hq/blob/main/upgrade-analysis/campfire-20260609-jwt_v3.1.2..v3.2.0.md🤖 Assisted by Claude
Security bump for CVE-2026-33306 (integer overflow → zero KDF iterations
at Cost=31). Not exposed: JRuby-only bug; campfire runs MRI (Ruby 3.4.5),
no java platform in lockfile, ActiveModel default cost is 10-12.
Direct gem (no version constraint, unchanged). 33 commits analyzed,
2 no-action mitigations (constant-time password compare hardening on the
has_secure_password path) — auth tests green.
https://github.com/basecamp/37signals-hq/blob/main/upgrade-analysis/campfire-20260609-bcrypt_v3.1.20..v3.1.22.md🤖 Assisted by Claude
Security bump for CVE-2026-35611 (High, ReDoS in Addressable::Template).
Not exposed: campfire never reaches Addressable::Template — runtime use
is geared_pagination's URI.parse; templates appear only in webmock test
stubs (all string/Regexp, never templates).
Transitive dep (no Gemfile change). 49 commits analyzed, 0 mitigations.
https://github.com/basecamp/37signals-hq/blob/main/upgrade-analysis/campfire-20260609-addressable_2.8.7..2.9.0.md🤖 Assisted by Claude
Security bump for CVE-2025-58767 (DoS on malformed XML). Conservative
update landed 3.4.4 (latest patch, above advisory floor of 3.4.2).
Test/build-only transitive dep (webmock→crack, selenium-webdriver);
absent from app runtime. 34 commits analyzed, 1 test-only mitigation
(no-root-element parse change) — verified green via full unit + system
test suites.
https://github.com/basecamp/37signals-hq/blob/main/upgrade-analysis/campfire-20260609-rexml_3.4.1..3.4.4.md🤖 Assisted by Claude
Adds a new endpoint that allows bots to add emoji reactions (boosts) to messages:
POST /rooms/:room_id/:bot_key/messages/:message_id/boosts
This enables bots to acknowledge messages with reactions like 👀 (eyes) when
mentioned, providing immediate feedback to users before generating a full response.
The endpoint:
- Validates the bot is a member of the room
- Validates the message exists in the room
- Broadcasts the boost to connected clients via Turbo Streams
- Returns 201 Created on success, 404 if room/message not found
Co-authored-by: openhands <openhands@all-hands.dev>
Changed `message.creator.role == "bot"` to `message.creator.bot?` per
Copilot code review. This is the idiomatic Rails pattern for enum checks
and consistent with how other role checks are done in the codebase.
Co-authored-by: openhands <openhands@all-hands.dev>
Fixed test bug identified by Copilot code review: pagination tests were
using Message.first and Message.last which could return messages from
different rooms than the test's @room (watercooler).
Now explicitly using messages(:fourth) and messages(:thirteenth) which
are fixtures belonging to the watercooler room where bender bot is a member.
Co-authored-by: openhands <openhands@all-hands.dev>
Both create and index now return HTTP 404 Not Found when a bot tries to
access a room it's not a member of. This is consistent with REST API
security best practices (not revealing resource existence) and ensures
read and write permissions are handled identically.
Changed create action to no longer call super (which rendered HTML) and
instead directly handle the request with proper JSON API error responses.
Added test to verify create returns 404 for non-member rooms.
Co-authored-by: openhands <openhands@all-hands.dev>
Added explicit RecordNotFound handling to return 404 when a bot tries to
read messages from a room it's not a member of. This matches the security
model used by the create action.
Added tests to verify:
- Bot gets 404 when trying to read from room it's not a member of
- Bot can successfully read from room it IS a member of
Co-authored-by: openhands <openhands@all-hands.dev>
Adds a new GET endpoint at /rooms/:room_id/:bot_key/messages that allows
bots to read messages from rooms they are members of.
The endpoint returns JSON with:
- Room info (id, name)
- Messages array with body (plain/html), created_at, and creator info
- Pagination info (oldest_id, newest_id, has_more)
Supports pagination via ?before=:id and ?after=:id query parameters,
consistent with the existing pagination in the messages controller.
This enables AI bots and other automated agents to understand conversation
context when responding to messages, rather than only receiving the single
message that triggered the webhook.
Co-authored-by: openhands <openhands@all-hands.dev>
* Add GitHub Actions audit job (actionlint + zizmor) to CI
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* Configure dependabot for GitHub Actions, bundler, and Docker
Batches all action updates into a single weekly PR. Adds cooldown
periods to all ecosystems.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* Add local GitHub Actions linting (actionlint + zizmor) to bin/setup and bin/ci
Install actionlint, shellcheck, and zizmor in bin/setup. Run both
linters as CI steps in config/ci.rb alongside existing style checks.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* Pin all GitHub Actions to SHA hashes
Run pinact to pin action versions to specific commit SHAs,
preventing supply chain attacks from tag mutation.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* Fix high severity zizmor findings
- Suppress unpinned-images for redis service containers (digest
pinning is nontrivial for service containers)
- Move workflow-level permissions to job-level in publish-image.yml
(build gets full set, manifest gets only what it needs)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* Fix medium severity zizmor findings
- Add persist-credentials: false to all checkout steps
- Add permissions: {} at workflow level in ci.yml
- Add job-level permissions (contents: read) to all CI jobs
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* Fix informational template-injection findings in publish-image.yml
Move steps.meta.outputs.tags from inline ${{ }} expressions to env
vars in both the manifest creation and cosign signing steps.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* Update brakeman to 8.0.4
bin/brakeman uses --ensure-latest which fails if not on the newest version.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Adds ipv4_mapped? and ipv4_compat? checks to PrivateNetworkGuard.private_ip?
to block SSRF bypass attempts using IPv6 address formats like:
- ::ffff:169.254.169.254 (IPv4-mapped)
- ::169.254.169.254 (IPv4-compatible)
These formats could previously bypass the link_local? check since Ruby
treats them as IPv6 addresses, not IPv4.
Ref: HackerOne #3481701
Mike Dalessio
Stanko Krtalić
Eric Hiler
John-Mason Shackelford
Rosa Gutierrez
Jeremy Daer
Mike Dalessio
Jason Zimdars
Ashwin M
Michael Halliday