Path traversal in https://github.com/rails/actionpack-page_caching
Priority MEDIUM 50CWE-22Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.
Summary
There is a vulnerability in actionpack_page-caching gem < v1.2.1 that allows an attacker to write arbitrary files to a web server, potentially resulting in remote code execution if the attacker can write unescaped ERB to a view.
Why it matters now
EPSS 0.0538 92nd percentileScored 2026-11-07
Fix Fixed actionpack-page_caching (RubyGems): 1.2.1
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | https://github.com/rails/actionpack-page_caching | v1.2.1 | — | No fix listed | CNA |
| — | actionpack-page_caching (RubyGems) | before 1.2.1 | 1.2.1 | Patch available | GHSA-mg5p-95m9-rmfp |
- https://github.com/rails/actionpack-page_caching Vendor— Affected v1.2.1 Fixed in — No fix listed CNA
- actionpack-page_caching (RubyGems) Vendor— Affected before 1.2.1 Fixed in 1.2.1 Patch available GHSA-mg5p-95m9-rmfp
Remediation
- Fix · GHSA-mg5p-95m9-rmfp actionpack-page_caching (RubyGems) Fixed in 1.2.1 Advisory →
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2020-8159
- 2026-10-03 Alias added: GHSA-mg5p-95m9-rmfp
References
Advisory 2
Sources
- CVE-2020-8159 · CVE Program
- CVE-2020-8159 · NVD
- FIRST EPSS
- GHSA-mg5p-95m9-rmfp · GitHub Advisory Database · CC BY 4.0
- CVE-2020-8159 · Red Hat security data · CC BY 4.0
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