# Rails Action Pack vulnerabilities

Source: https://junglewise.ai/threats/technologies/action-pack  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 13 November 2026, 01:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/action-pack.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 6 vulnerabilities in Rails Action Pack: 6 in the last 7 days and 6 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-126083, was published on 10 November 2026. Nothing was published in the last eight weeks.

## Counts

- Last 7 days: 6
- Last 30 days: 6
- Last 90 days: 6
- All time: 6 (0 critical, 0 exploited in the wild)

## Latest Rails Action Pack vulnerabilities

- [CVE-2026-126083: Rails Action Pack remote IP spoofing in request handling](https://junglewise.ai/threats/cve-2026-126083-action-pack-is-a-framework-for-handling-and-responding-to-web) (high, CVSS 7.4, published 10 Nov 2026)
- [CVE-2026-126081: Rails Action Pack mass assignment bypass in Parameters#each_key](https://junglewise.ai/threats/cve-2026-126081-action-pack-is-a-framework-for-handling-and-responding-to-web) (high, CVSS 7.5, published 10 Nov 2026)
- [CVE-2026-126077: Rails Action Pack session cookie exposure in cached responses](https://junglewise.ai/threats/cve-2026-126077-action-pack-is-a-framework-for-handling-and-responding-to-web) (medium, CVSS 6.8, published 10 Nov 2026)
- [CVE-2026-126076: Ruby on Rails Action Pack session restoration after logout](https://junglewise.ai/threats/cve-2026-126076-action-pack-is-a-framework-for-handling-and-responding-to-web) (medium, CVSS 4.2, published 10 Nov 2026)
- [CVE-2026-126073: Rails Action Pack cache poisoning via content-type negotiation](https://junglewise.ai/threats/cve-2026-126073-action-pack-is-a-framework-for-handling-and-responding-to-web) (medium, CVSS 4.8, published 10 Nov 2026)
- [CVE-2026-126072: Rails Action Pack thread exhaustion in ActionController::Live](https://junglewise.ai/threats/cve-2026-126072-action-pack-is-a-framework-for-handling-and-responding-to-web) (medium, CVSS 5.9, published 10 Nov 2026)

## Most severe Rails Action Pack vulnerabilities

- [CVE-2026-126081: Rails Action Pack mass assignment bypass in Parameters#each_key](https://junglewise.ai/threats/cve-2026-126081-action-pack-is-a-framework-for-handling-and-responding-to-web) (high, CVSS 7.5, published 10 Nov 2026)
- [CVE-2026-126083: Rails Action Pack remote IP spoofing in request handling](https://junglewise.ai/threats/cve-2026-126083-action-pack-is-a-framework-for-handling-and-responding-to-web) (high, CVSS 7.4, published 10 Nov 2026)
- [CVE-2026-126077: Rails Action Pack session cookie exposure in cached responses](https://junglewise.ai/threats/cve-2026-126077-action-pack-is-a-framework-for-handling-and-responding-to-web) (medium, CVSS 6.8, published 10 Nov 2026)
- [CVE-2026-126072: Rails Action Pack thread exhaustion in ActionController::Live](https://junglewise.ai/threats/cve-2026-126072-action-pack-is-a-framework-for-handling-and-responding-to-web) (medium, CVSS 5.9, published 10 Nov 2026)
- [CVE-2026-126073: Rails Action Pack cache poisoning via content-type negotiation](https://junglewise.ai/threats/cve-2026-126073-action-pack-is-a-framework-for-handling-and-responding-to-web) (medium, CVSS 4.8, published 10 Nov 2026)
- [CVE-2026-126076: Ruby on Rails Action Pack session restoration after logout](https://junglewise.ai/threats/cve-2026-126076-action-pack-is-a-framework-for-handling-and-responding-to-web) (medium, CVSS 4.2, published 10 Nov 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 6 | 0 | 0 |

## Other Rails technologies

- [Rails Action View](https://junglewise.ai/threats/technologies/action-view): 3 vulnerabilities
- [Rails Ruby on Rails](https://junglewise.ai/threats/technologies/ruby-on-rails): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Rails Action Pack vulnerabilities", https://junglewise.ai/threats/technologies/action-pack, 13 November 2026.