CVE-2013-0156

NONECVSS 0.09.0▲
EchelonGraph scoreLOW confidence

Score elevated to 9.0 because EPSS predicts 92% probability of exploitation within the next 30 days (top 0.3% of all CVEs). Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss
Weaponized
0.0
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 99%
CISA-KEV: Not listedEPSS: 99%CVSS: —Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
—
EG Score
9.0(low)
EPSS
99.9%
KEV
Not listed

Published

January 13, 2013

Last Modified

April 29, 2026

References (28)

Vendor Advisories for CVE-2013-0156(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrubygem-activesupport-1:3.0.10-5.el6cf2013-01-10redhat
redhatrubygem-activesupport-1:3.0.13-2.el6op2013-01-10redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
RubyGems(1)
PackageVulnerable rangeFixed inDependents
actionpack3.2.0 ... 3.2.9.rc3 (21 versions)3.2.11—

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 2× in last 7d / 7× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-05 10:29 UTCOSV refresh
  2. 2026-07-01 15:02 UTCEPSS rescore
  3. 2026-06-16 21:35 UTCOSV refresh
  4. 2026-06-15 17:44 UTCEPSS rescore
  5. 2026-06-12 23:08 UTCEPSS rescore
  6. 2026-06-10 13:18 UTCEPSS rescore
  7. 2026-06-08 14:14 UTCEPSS rescore
  8. 2026-06-06 13:45 UTCEPSS rescore
  9. 2026-06-06 13:45 UTCEPSS rescore
  10. 2026-06-05 22:44 UTCEPSS rescore
  11. 2026-06-05 22:44 UTCEPSS rescore
  12. 2026-05-29 13:41 UTCEPSS rescore
  13. 2026-05-29 13:41 UTCEPSS rescore
  14. 2026-05-29 01:21 UTCEG score recompute
  15. 2026-05-29 01:21 UTCVendor advisory
  16. 2026-05-28 13:42 UTCEPSS rescore
  17. 2026-05-28 13:42 UTCEPSS rescore
  18. 2026-05-28 13:42 UTCEPSS rescore
  19. 2026-05-20 20:03 UTCOSV refresh
  20. 2026-05-18 21:29 UTCEPSS rescore
  21. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(6 references)

Working exploit code is in the public domain (3 Metasploit modules) (1 GitHub PoC) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-27527✓ verified
    First seen Aug 12, 2013

    Ruby on Rails - Known Secret Session Cookie Remote Code Execution (Metasploit)

    Open source ↗
  • Metasploitexploit/multi/http/rails_secret_deserialization✓ verified
    First seen Apr 11, 2013

    Ruby on Rails Known Secret Session Cookie Remote Code Execution

    Open source ↗
  • GitHub PoCbsodmike/rails-exploit-cve-2013-0156
    First seen Jan 12, 2013

    Bootstrapped Rails 3.2.10 to test the remote code exploit CVE-2013-0156

    Open source ↗
  • Exploit-DBEDB-24019✓ verified
    First seen Jan 10, 2013

    Ruby on Rails - XML Processor YAML Deserialization Code Execution (Metasploit)

    Open source ↗
  • Metasploitexploit/multi/http/rails_xml_yaml_code_exec✓ verified
    First seen Jan 7, 2013

    Ruby on Rails XML Processor YAML Deserialization Code Execution

    Open source ↗
  • Metasploitauxiliary/scanner/http/rails_xml_yaml_scanner✓ verified
    First seen Jan 1, 2013

    Ruby on Rails XML Processor YAML Deserialization Scanner

    Open source ↗

Frequently asked(4)

What is CVE-2013-0156?
CVE-2013-0156 is a none vulnerability published on January 13, 2013. activesupport/coreext/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…
When was CVE-2013-0156 disclosed?
CVE-2013-0156 was first published in the National Vulnerability Database on January 13, 2013, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2013-0156 actively exploited?
CVE-2013-0156 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2013-0156?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2013-0156, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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