Ruby before 1.8.7-p352 does not reset the random seed upon forking, which makes it easier for context-dependent attackers to predict the values of random numbers by leveraging knowledge of the number sequence obtained in a different child process, a related issue to CVE-2003-0900. NOTE: this issue exists because of a regression during Ruby 1.8.6 development.
結論預警: CVE-2011-2686 綜合評估為中等風險（51.1/100）：CVSS 技術影響為中級，利用機率（EPSS 2.58%） 核心證據: 近一日 EPSS 上升 +1.99%，被利用關注度持續升高。 強制指令: 梳理受影響資產並納入修補計畫。
風險隨態勢動態變化；本站持續評估並同步更新本頁展示內容。
EPSS 日更估計相對被利用可能性；百分位表示該 CVE 在已評分漏洞中的相對排名（越高表示相對更嚴重）。
| # | 日期 | 舊 EPSS 分數 | 新 EPSS 分數 | 變化（新 − 舊） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.59% | 2.58% | +1.99% |
| 2 | 2026-06-04 | 0.78% | 0.59% | -0.19% |
| 3 | 2026-06-01 | — | 0.78% | — |
完整 EPSS 歷史 （共 15 筆）
該 CVE 的 CVSS 指標。
| 底座分 | 版本 | 嚴重度 | 向量 | 可利用性 | 影響 | 分數來源 |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2011-2686 |
suse
|
low | CVE-2011-2686 severity low: SUSE including 14 source package names (ruby-1.8.7.p357-0.7.1, ruby-1.8.7.p357-0.9.17.1, …), 19 product×package rows across 6 product lines (SUSE Linux Enterprise Server 11 SP1-TERADATA, SUSE Linux Enterprise Server 11 SP2, … (6 product lines)): Fixed 19. | https://www.suse.com/security/cve/CVE-2011-2686/ |
ubuntu
|
medium | CVE-2011-2686 medium priority: Ubuntu including 1 source packages (ruby1.8), 6 status rows across 6 suites (hardy, lucid, maverick, natty, oneiric, upstream): released 4, ignored 1, not-affected 1. | https://ubuntu.com/security/CVE-2011-2686 |
| 廠商 | 產品 | 版本 | 原始 CPE |
|---|---|---|---|
| ruby-lang | ruby | <= 1.8.7-334 | cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p22:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p71:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p72:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7-160 | cpe:2.3:a:ruby-lang:ruby:1.8.7-160:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7-173 | cpe:2.3:a:ruby-lang:ruby:1.8.7-173:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7-248 | cpe:2.3:a:ruby-lang:ruby:1.8.7-248:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7-249 | cpe:2.3:a:ruby-lang:ruby:1.8.7-249:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7-299 | cpe:2.3:a:ruby-lang:ruby:1.8.7-299:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7-302 | cpe:2.3:a:ruby-lang:ruby:1.8.7-302:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7-330 | cpe:2.3:a:ruby-lang:ruby:1.8.7-330:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7-p21 | cpe:2.3:a:ruby-lang:ruby:1.8.7-p21:*:*:*:*:*:*:* |