CVE-2022-47986Known exploitationPublic exploitNetwork attack vector

Unauthenticated code execution via unsafe YAML.load

Published Feb 17, 2023 · Updated Oct 21, 2025

YAML deserialization in IBM Aspera Faspex 4.4.2 Patch Level 1 and earlier allows remote attackers to execute arbitrary code. The unauthenticated package relay controller passes the external_emails parameter to YAML.load, allowing crafted objects to invoke Ruby gadget chains. A network request to the obsolete /package_relay/relay_package API requires no account or user interaction and executes commands in the Faspex server context.

CVSS severity9.8
Critical
EPSS probability99.97%
Next 30 days · Nov 1, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Contact us

Summary

What happened

YAML deserialization in IBM Aspera Faspex 4.4.2 Patch Level 1 and earlier allows remote attackers to execute arbitrary code. The unauthenticated package relay controller passes the external_emails parameter to YAML.load, allowing crafted objects to invoke Ruby gadget chains. A network request to the obsolete /package_relay/relay_package API requires no account or user interaction and executes commands in the Faspex server context.

The record

CVE
CVE-2022-47986
Published
Feb 17, 2023
Updated
Oct 21, 2025
Vendor
Micromuse
Product
IBM Aspera Faspex
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 21, 2023Exploitation reportedCISA Known Exploited Vulnerabilities Catalog listing
  3. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.4.2 Patch Level 1 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Micromuse · IBM Aspera Faspexversion=4.4.2 Patch Level 1 and earlier

Published CVSS scores

9.8IBMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsShadowserver observations through Sep 28, 2026. Gaps indicate unavailable data.
Sep 22, 2026Sep 28, 2026
View daily counts
Reporting dayUnique IPs
Sep 22, 20268
Sep 23, 20262
Sep 24, 20263
Sep 25, 20268
Sep 26, 20261
Sep 27, 202610
Sep 28, 20266
Latest reporting daySep 28, 2026
Latest daily unique IPs6
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Contact us