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High

SnakeYAML Entity Expansion during load operation

  • Disclosed: 04.06.2021
  • Updated: 11.10.2026 12:21

The Alias feature in SnakeYAML 1.18 allows entity expansion during a load operation, a related issue to CVE-2003-1564.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Java / Kotlin (Maven) org.yaml:snakeyaml < 1.26 1.26

References

CVSS score 7.5/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE)
CWE-776
Platform
Java / Kotlin (Maven)
Package
org.yaml:snakeyaml
Disclosed
04.06.2021
Updated
11.10.2026 12:21

Sources and licenses

OSV / GitHub Advisory Database - GHSA-rvwf-54qp-4r6v - CC BY 4.0

Vulnerability history: org.yaml:snakeyaml

All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.

Total entries
8
First → latest
06.2021 12.2022
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • High 3
  • Medium 5

Disclosures per year

  1. SnakeYaml Constructor Deserialization Remote Code Execution
    High · 8.3 CVE-2022-1471 < 2.0 2.0
  2. Snakeyaml vulnerable to Stack overflow leading to denial of service
    Medium · 6.5 CVE-2022-41854 < 1.32 1.32
  3. snakeYAML before 1.31 vulnerable to Denial of Service due to Out-of-bounds Write
    Medium · 5.5 CVE-2022-38750 < 1.31 1.31
  4. snakeYAML before 1.31 vulnerable to Denial of Service due to Out-of-bounds Write
    Medium · 6.5 CVE-2022-38749 < 1.31 1.31
  5. snakeYAML before 1.32 vulnerable to Denial of Service due to Out-of-bounds Write
    Medium · 6.5 CVE-2022-38752 < 1.32 1.32
  6. snakeYAML before 1.31 vulnerable to Denial of Service due to Out-of-bounds Write
    Medium · 6.5 CVE-2022-38751 < 1.31 1.31
  7. Uncontrolled Resource Consumption in snakeyaml
    High · 7.5 CVE-2022-25857 < 1.31 1.31
  8. SnakeYAML Entity Expansion during load operation this entry
    High · 7.5 CVE-2017-18640 < 1.26 1.26

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