CVE-2024-41128 — actionpack
Fix: rails/rails@27121e8CVE-2024-41128 is a CWE-770 vulnerability in actionpack. A fix is available for actionpack — see the affected versions and patch details below.
Action Dispatch has possible ReDoS vulnerability in query parameter filtering
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2024-41128.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Real-World Exposure
actionpack💎actionpack💎actionpack💎actionpackReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.
Description
There is a possible ReDoS vulnerability in the query parameter filtering routines of Action Dispatch. This vulnerability has been assigned the CVE identifier CVE-2024-41128.
Impact
Carefully crafted query parameters can cause query parameter filtering to take an unexpected amount of time, possibly resulting in a DoS vulnerability. All users running an affected release should either upgrade or apply the relevant patch immediately.
Ruby 3.2 has mitigations for this problem, so Rails applications using Ruby 3.2 or newer are unaffected. Rails 8.0.0.beta1 depends on Ruby 3.2 or greater so is unaffected.
Releases
The fixed releases are available at the normal locations.
Workarounds
Users on Ruby 3.2 are unaffected by this issue.
Credits
Thanks to scyoon for the report and patches!
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 💎RubyGems | actionpack | ≥ 3.1.0&&< 6.1.7.9 | 6.1.7.9bundle update actionpack --conservative |
| 💎RubyGems | actionpack | ≥ 7.0.0&&< 7.0.8.5 | 7.0.8.5bundle update actionpack --conservative |
| 💎RubyGems | actionpack | ≥ 7.1.0&&< 7.1.4.1 | 7.1.4.1bundle update actionpack --conservative |
| 💎RubyGems | actionpack | ≥ 7.2.0&&< 7.2.1.1 | 7.2.1.1bundle update actionpack --conservative |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for actionpack, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update actionpack to 6.1.7.9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-41128 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2024-41128 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2024-41128. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2024-41128 in your dependencies?
O3 Security finds CVE-2024-41128 across RubyGems dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.