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TI-2017-13794 Aliases CVE-2017-18640GHSA-rvwf-54qp-4r6v

The Alias feature in SnakeYAML before 1.26 allows entity expansion during a load…

Priority MEDIUM 55CWE-776Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 4 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat.

Summary

The Alias feature in SnakeYAML before 1.26 allows entity expansion during a load operation, a related issue to CVE-2003-1564.

Why it matters now

EPSS 0.26723 98th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Partial org.yaml:snakeyaml (Maven): 1.26Red Hat: 4 advisoriesRed Hat: 4 fixed, 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—org.yaml:snakeyaml (Maven)before 1.261.26Patch availableGHSA-rvwf-54qp-4r6v
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • org.yaml:snakeyaml (Maven) Vendor— Affected before 1.26 Fixed in 1.26 Patch available GHSA-rvwf-54qp-4r6v

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:a:snakeyaml_project:snakeyaml:*:*:*:*:*:*:*:*before 1.26Vulnerablesnakeyaml
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*31VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*32VulnerableFedoraproject
cpe:2.3:a:quarkus:quarkus:*:*:*:*:*:*:*:*up to 1.3.4Vulnerablequarkusio
cpe:2.3:a:oracle:peoplesoft_enterprise_pt_peopletools:8.56:*:*:*:*:*:*:*8.56VulnerableOracle
cpe:2.3:a:oracle:peoplesoft_enterprise_pt_peopletools:8.57:*:*:*:*:*:*:*8.57VulnerableOracle
cpe:2.3:a:oracle:peoplesoft_enterprise_pt_peopletools:8.58:*:*:*:*:*:*:*8.58VulnerableOracle
  • cpe:2.3:a:snakeyaml_project:snakeyaml:*:*:*:*:*:*:*:* Versions before 1.26 Vulnerable ·snakeyaml
  • cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
  • cpe:2.3:a:quarkus:quarkus:*:*:*:*:*:*:*:* Versions up to 1.3.4 Vulnerable ·quarkusio
  • cpe:2.3:a:oracle:peoplesoft_enterprise_pt_peopletools:8.56:*:*:*:*:*:*:* Versions 8.56 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:peoplesoft_enterprise_pt_peopletools:8.57:*:*:*:*:*:*:* Versions 8.57 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:peoplesoft_enterprise_pt_peopletools:8.58:*:*:*:*:*:*:* Versions 8.58 Vulnerable ·Oracle

Remediation

  • Fix · GHSA-rvwf-54qp-4r6v org.yaml:snakeyaml (Maven) Fixed in 1.26 Advisory →

Red Hat 4 advisories

  • RHSA-2021:3225 Released 2021-08-19 · Red Hat rating Moderate
    Red Hat AMQ Streams 1.8.0 release and security update
    • Red Hat AMQ Streams 1.8.0
  • RHSA-2021:3140 Released 2021-08-11 · Red Hat rating Moderate
    Red Hat Fuse 7.9.0 release and security update
    • Red Hat Fuse 7.9
  • RHSA-2020:4807 Released 2020-11-04 · Red Hat rating Moderate
    prometheus-jmx-exporter security update
    • Red Hat Enterprise Linux AppStream (v. 8) prometheus-jmx-exporter-0.12.0-6.el8
Show 1 more Red Hat advisories
  • RHSA-2020:2603 Released 2020-06-17 · Red Hat rating Moderate
    Red Hat build of Quarkus 1.3.4 security update
    • Red Hat build of Quarkus 1.3.4

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Will not fix
Red Hat Software CollectionsAffectedNo fix planned: Will not fix
Red Hat AMQ Streams 1.8.0Fixed RHSA-2021:3225
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2020:4807
Red Hat Fuse 7.9Fixed RHSA-2021:3140
Red Hat build of Quarkus 1.3.4Fixed RHSA-2020:2603
Not affected: 2 products
  • Red Hat A-MQ Online
  • Red Hat Single Sign-On 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-18640
  2. 2026-10-03 Alias added: GHSA-rvwf-54qp-4r6v

References

Exploit 2

Patch 1

Advisory 7

Other 105

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences