GHSA-48c2-rrv3-qjmp · 深刻度： medium · エコシステム： npm — yaml is vulnerable to Stack Overflow via deeply nested YAML collections
`yaml` is a YAML parser and serialiser for JavaScript. Parsing a YAML document with a version of `yaml` on the 1.x branch prior to 1.10.3 or on the 2.x branch prior to 2.8.3 may throw a RangeError due to a stack overflow. The node resolution/composition phase uses recursive function calls without a depth bound. An attacker who can supply YAML for parsing can trigger a `RangeError: Maximum call stack size exceeded` with a small payload (~2–10 KB). The `RangeError` is not a `YAMLParseError`, so applications that only catch YAML-specific errors will encounter an unexpected exception type. Depending on the host application's exception handling, this can fail requests or terminate the Node.js process. Flow sequences allow deep nesting with minimal bytes (2 bytes per level: one `[` and one `]`). On the default Node.js stack, approximately 1,000–5,000 levels of nesting (2–10 KB input) exhaust the call stack. The exact threshold is environment-dependent (Node.js version, stack size, call stack depth at invocation). Note: the library's `Parser` (CST phase) uses a stack-based iterative approach and is not affected. Only the compose/resolve phase uses actual call-stack recursion. All three public parsing APIs are affected: `YAML.parse()`, `YAML.parseDocument()`, and `YAML.parseAllDocuments()`. Versions 1.10.3 and 2.8.3 contain a patch.
総合評価: CVE-2026-33532 は公開エクスプロイトあり（50/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 0.47%、37 パーセンタイル） 根拠: 公開エクスプロイトが 1 件参照されています（Exploit-DB）。 推奨対応: 公開エクスプロイトが確認されています。影響範囲の確認、緩和策の適用、パッチ適用を優先してください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
| EDB-ID | ソース | 種別 | 公開 | リンク |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.02% | 0.47% | +0.45% |
| 2 | 2026-05-22 | 0.05% | 0.02% | -0.03% |
| 3 | 2026-04-01 | — | 0.05% | — |
EPSS の全履歴 （全 4 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 4.3 | 3.1 | MEDIUM |
|
2.8 | 1.4 | [email protected] |
GHSA-48c2-rrv3-qjmp · 深刻度： medium · エコシステム： npm — yaml is vulnerable to Stack Overflow via deeply nested YAML collections
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-33532 not yet assigned priority: Debian including 1 source packages (node-yaml), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 3, resolved 2. | https://security-tracker.debian.org/tracker/CVE-2026-33532 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2026-33532 |
suse
|
medium | CVE-2026-33532 severity moderate: SUSE including 3 source package names (pgadmin4, pgadmin4-doc, pgadmin4-web), 6 product×package rows across 2 product lines (SUSE Linux Enterprise Server 15 SP1-LTSS, SUSE Linux Enterprise Server 15 SP2-LTSS): Known Not Affected 6. | https://www.suse.com/security/cve/CVE-2026-33532/ |
ubuntu
|
medium | CVE-2026-33532 medium priority: Ubuntu including 1 source packages (node-yaml), 4 status rows across 4 suites (jammy, noble, questing, upstream): needs-triage 3, released 1. | https://ubuntu.com/security/CVE-2026-33532 |