CVE-2026-44836
Description
view_component is a framework for building reusable, testable, and encapsulated view components in Ruby on Rails. From 3.0.0 to 4.9.0, the preview route derives an example name from the URL and calls it with public_send. The code does not verify that the requested method is one of the preview examples explicitly defined by the preview class. As a result, inherited public methods on ViewComponent::Preview are route-reachable. The most important one is render_with_template, which accepts template: and locals:. Those values can come from request params and are later passed to Rails as render template:. If previews are exposed, an attacker can render internal Rails templates that are not otherwise routable. This vulnerability is fixed in 4.9.0.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Affected 3 releases
| Version | Status | Fixed in |
|---|---|---|
| sid | Affected | — |
| forky | Affected | — |
| bookworm | Affected | — |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| RubyGems | view_component | !< 3.0.0||<>= 4.9.0 | >= 4.9.0 |
| RubyGems | view_component | >=3.0.0,<4.9.0 | 4.9.0 |
| RUBYGEMS | view_component | >= 3.0.0, < 4.9.0 | 4.9.0 |
References
- https://github.com/ViewComponent/view_component/security/advisories/GHSA-7f3r-gwc9-2995
- https://github.com/ViewComponent/view_component
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/view_component/CVE-2026-44836.yml
- https://github.com/advisories/GHSA-7f3r-gwc9-2995
- https://security-tracker.debian.org/tracker/CVE-2026-44836
CWEs
CWE-749
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.