CVE-2011-5331
Distributed Ruby (aka DRuby) 1.8 mishandles instance_eval.
Distributed Ruby (aka DRuby) 1.8 mishandles instance_eval.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Distributed Ruby (aka DRuby) 1.8 mishandles instance_eval.
- Record
CVE-2011-5331- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Updated
- 2026-11-02
CVE List No score
Distributed Ruby (aka DRuby) 1.8 mishandles instance_eval.
- Record
CVE-2011-5331- Updated
- 2026-11-02
EUVDEUVD-2011-5230 No score
Distributed Ruby (aka DRuby) 1.8 mishandles instance_eval.
- Record
EUVD-2011-5230- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-pwpp-rx7c-4hmx
Distributed Ruby (aka DRuby) 1.8 mishandles instance_eval.
Distributed Ruby (aka DRuby) 1.8 mishandles instance_eval.
- Record
GHSA-pwpp-rx7c-4hmx- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | tomquinn8/CVE-2011-5331 | 2021-11-16 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2011-5331 is a critical vulnerability (CVSS 9.8) in Distributed Ruby Project Ruby, published November 18, 2019. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 2.75%, the 86th percentile. No source names a fixed version.