汇总 pyyaml 相关全部产品的 CVE 与安全漏洞情报，包括 CVSS、EPSS、公开时间与漏洞情报数据。
常见弱点模式包括 输入验证问题与缓冲区溢出，在 生产负载与软件部署 使用场景中可能带来 异常行为、应用崩溃与内存损坏 等风险。
相关漏洞数据主要来源于公开漏洞披露与安全公告，可用于评估历史漏洞暴露面与修复优先级。
| CVE | 摘要 | 来源 | 最高 CVSS | EPSS % | 公开时间 | 更新时间 |
|---|---|---|---|---|---|---|
| CVE-2020-14343 | A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747. | [email protected] | 9.8 | 5.98% | 2021-02-09 | 2026-06-16 |
| CVE-2020-1747 | A vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. An attacker could use this flaw to execute arbitrary code on the system by abusing the python/object/new constructor. | [email protected] | 9.8 | 5.30% | 2020-03-24 | 2026-06-16 |
| CVE-2019-20477 | PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342. | [email protected] | 9.8 | 5.16% | 2020-02-18 | 2026-06-16 |
| CVE-2017-18342 | In PyYAML before 5.1, the yaml.load() API could execute arbitrary code if used with untrusted data. The load() function has been deprecated in version 5.1 and the 'UnsafeLoader' has been introduced for backward compatibility with the function. | [email protected] | 9.8 | 6.03% | 2018-06-27 | 2026-06-16 |
| CVE-2014-9130 | scanner.c in LibYAML 0.1.5 and 0.1.6, as used in the YAML-LibYAML (aka YAML-XS) module for Perl, allows context-dependent attackers to cause a denial of service (assertion failure and crash) via vectors involving line-wrapping. | [email protected] | 5.0 | 13.20% | 2014-12-08 | 2026-06-16 |
| CVE-2014-2525 | Heap-based buffer overflow in the yaml_parser_scan_uri_escapes function in LibYAML before 0.1.6 allows context-dependent attackers to execute arbitrary code via a long sequence of percent-encoded characters in a URI in a YAML file. | [email protected] | 6.8 | 9.26% | 2014-03-28 | 2026-06-16 |
| CVE-2013-6393 | The yaml_parser_scan_tag_uri function in scanner.c in LibYAML before 0.1.5 performs an incorrect cast, which allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via crafted tags in a YAML document, which triggers a heap-based buffer overflow. | [email protected] | 6.8 | 9.31% | 2014-02-06 | 2026-06-16 |