GHSA-v6j3-7jrw-hq2p · Severity: medium · Ecosystem: rubygems — Rack Gem Subject to Denial of Service via Hash Collisions
Rack before 1.1.3, 1.2.x before 1.2.5, and 1.3.x before 1.3.6 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.
Conclusion & alert: CVE-2011-5036 is rated High Exploit Risk (69/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 4.02%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.74% over the last day, indicating growing attacker interest. Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 1.28% | 4.02% | +2.74% |
| 2 | 2025-03-30 | 2.11% | 1.28% | -0.83% |
| 3 | 2025-03-29 | — | 2.11% | — |
Full EPSS history (6 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
GHSA-v6j3-7jrw-hq2p · Severity: medium · Ecosystem: rubygems — Rack Gem Subject to Denial of Service via Hash Collisions
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2011-5036 not yet assigned priority: Debian including 1 source packages (ruby-rack), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2011-5036 |
gentoo
|
normal | CVE-2011-5036: 1 GLSA(s) (201203-05), 1 atom(s) (dev-ruby/rack); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-5036 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2011-5036 |
ubuntu
|
medium | CVE-2011-5036 medium priority: Ubuntu including 1 source packages (ruby-rack), 17 status rows across 17 suites (hardy, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): not-affected 10, DNE 5, ignored 1, released 1. | https://ubuntu.com/security/CVE-2011-5036 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| rack_project | rack | <= 1.1.0 | cpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:* |
| rack_project | rack | 1.2.0 | cpe:2.3:a:rack_project:rack:1.2.0:*:*:*:*:*:*:* |
| rack_project | rack | 1.2.1 | cpe:2.3:a:rack_project:rack:1.2.1:*:*:*:*:*:*:* |
| rack_project | rack | 1.2.2 | cpe:2.3:a:rack_project:rack:1.2.2:*:*:*:*:*:*:* |
| rack_project | rack | 1.2.3 | cpe:2.3:a:rack_project:rack:1.2.3:*:*:*:*:*:*:* |
| rack_project | rack | 1.2.4 | cpe:2.3:a:rack_project:rack:1.2.4:*:*:*:*:*:*:* |
| rack_project | rack | 1.3.0 | cpe:2.3:a:rack_project:rack:1.3.0:*:*:*:*:*:*:* |
| rack_project | rack | 1.3.1 | cpe:2.3:a:rack_project:rack:1.3.1:*:*:*:*:*:*:* |
| rack_project | rack | 1.3.2 | cpe:2.3:a:rack_project:rack:1.3.2:*:*:*:*:*:*:* |
| rack_project | rack | 1.3.3 | cpe:2.3:a:rack_project:rack:1.3.3:*:*:*:*:*:*:* |
| rack_project | rack | 1.3.4 | cpe:2.3:a:rack_project:rack:1.3.4:*:*:*:*:*:*:* |
| rack_project | rack | 1.3.5 | cpe:2.3:a:rack_project:rack:1.3.5:*:*:*:*:*:*:* |