The JSON gem before 1.5.5, 1.6.x before 1.6.8, and 1.7.x before 1.7.7 for Ruby allows remote attackers to cause a denial of service (resource consumption) or bypass the mass assignment protection mechanism via a crafted JSON document that triggers the creation of arbitrary Ruby symbols or certain internal objects, as demonstrated by conducting a SQL injection attack against Ruby on Rails, aka "Unsafe Object Creation Vulnerability."
CVE-2013-0269
HIGHCVSS v2 · 7.57.5—Elevated
EchelonGraph scoreLOW confidence
This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 7.5 — v2 rates that HIGH (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:L/Au:N/C:P/I:P/A:P. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 13.9% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.
Sources: epss, nvd_v2
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 13%CVSS v2: 7.5Exploit: Elevated riskExposed services: —
A fix is available — apply it.
Internet exposure
The internet-exposure footprint is temporarily unavailable — the KEV-Exposure radar's record for this CVE could not be loaded just now. That is not a finding of zero exposed services; please retry shortly.
- CVSS v2.0 (legacy)
- 7.5HIGHNVD never assigned a CVSS v3 rating to this CVE
- EG Score
- 7.5HIGHlow confidence
- EG Risk
- 54EG Risk 54/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity75% × 45%Exploitation40% × 40%Automatability30% × 15%CISA SSVC: Track at low, Track or Track* at medium and Track* or Attend at high mission impact.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 13%
- EPSS %ILE
- 96th
- KEV
- Not listed
CISA SSVCTrack at low, Track or Track* at medium and Track* or Attend at high mission impact.
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation public PoC (EG-KEV: elevated) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
February 13, 2013
Last Modified
April 29, 2026
References (46)
- secalert@redhathttp://lists.apple.com/archives/security-announce/2013/Oct/msg00006.html
- secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2013-04/msg00001.html
- secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2013-04/msg00015.html
- secalert@redhathttp://lists.opensuse.org/opensuse-updates/2013-04/msg00034.html
- secalert@redhathttp://rhn.redhat.com/errata/RHSA-2013-0686.html
- secalert@redhathttp://rhn.redhat.com/errata/RHSA-2013-0701.html
- secalert@redhathttp://rhn.redhat.com/errata/RHSA-2013-1028.html
- secalert@redhathttp://rhn.redhat.com/errata/RHSA-2013-1147.html
- secalert@redhathttp://secunia.com/advisories/52075
- secalert@redhathttp://secunia.com/advisories/52774
- secalert@redhathttp://secunia.com/advisories/52902
- secalert@redhathttp://spreecommerce.com/blog/multiple-security-vulnerabilities-fixed
- secalert@redhathttp://weblog.rubyonrails.org/2013/2/11/SEC-ANN-Rails-3-2-12-3-1-11-and-2-3-17-have-been-released/
- secalert@redhathttp://www.openwall.com/lists/oss-security/2013/02/11/7
- secalert@redhathttp://www.openwall.com/lists/oss-security/2013/02/11/8
Related CVEs(same product + same vendor)· as of October 5, 2026
Same product
10 shownDebian:11:ruby-json · Debian:13:ruby-json · Debian:14:ruby-json
Same vendor
10 shownredhat:RHSA-2013:1028 · redhat:RHSA-2013:0686 · redhat:RHSA-2013:1185
Frequently asked(4)
What is CVE-2013-0269?
CVE-2013-0269 is a high vulnerability published on February 13, 2013. The JSON gem before 1.5.5, 1.6.x before 1.6.8, and 1.7.x before 1.7.7 for Ruby allows remote attackers to cause a denial of service (resource consumption) or bypass the mass assignment protection mechanism via a crafted JSON document that triggers the creation of arbitrary Ruby symbols or certain…
When was CVE-2013-0269 disclosed?
CVE-2013-0269 was first published on February 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-2013-0269 actively exploited?
CVE-2013-0269 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 13% probability of exploitation in the next 30 days (96th percentile of EPSS-scored CVEs).
How do I remediate CVE-2013-0269?
A fix for CVE-2013-0269 is available: update to the fixed version the vendor names in its advisory.
Dependency Blast Radius
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