CVE-2013-0156
Description
active_support/core_ext/hash/conversions.rb in Ruby on Rails before 2.3.15, 3.0.x before 3.0.19, 3.1.x before 3.1.10, and 3.2.x before 3.2.11 does not properly restrict casts of string values, which allows remote attackers to conduct object-injection attacks and execute arbitrary code, or cause a denial of service (memory and CPU consumption) involving nested XML entity references, by leveraging Action Pack support for (1) YAML type conversion or (2) Symbol type conversion.
Official description from the CVE record, published by redhat. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org
Key data
EPSS
- Score
- 0.98979 (99.0% probability)
- Percentile
- 99.9%
- Scores of
- Nov 10, 2026
- Model
- v2026.06.15
References
- [rubyonrails-security] 20130108 Multiple vulnerabilities in parameter parsing in Action Pack (CVE-2013-0156) (groups.google.com)mailing-list
- insinuator.net/2013/01/rails-yaml
- RHSA-2013:0155 (rhn.redhat.com)vendor-advisory
- VU#628463 (kb.cert.org)third-party-advisory
- community.rapid7.com/community/metasploit/blog/2013/01/09/s…
- fujitsu.com/global/support/software/security/products-f/sw-…
- VU#380039 (kb.cert.org)third-party-advisory
- APPLE-SA-2013-03-14-1 (lists.apple.com)vendor-advisory
- DSA-2604 (debian.org)vendor-advisory
- ics-cert.us-cert.gov/advisories/ICSA-13-036-01A
- RHSA-2013:0154 (rhn.redhat.com)vendor-advisory
- puppet.com/security/cve/cve-2013-0156
- weblog.rubyonrails.org/2013/1/28/Rails-3-0-20-and-2-3-16-ha…
- RHSA-2013:0153 (rhn.redhat.com)vendor-advisory
Timeline
- ID reserved
- Record published
- Record last updated
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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:48 UTC. Sources and licenses