CVE-2023-47163Public exploitNetwork attack vector

Denial of service via unlimited YAML alias expansion

Published Nov 13, 2023 · Updated Jan 8, 2025

Uncontrolled resource consumption in Remarshal before 0.17.1 allows remote attackers to interrupt conversion using crafted YAML aliases. The YAML conversion path recursively traverses expanded anchor aliases without limiting the resulting node count. Exploitation requires a deployment that accepts attacker-supplied YAML; resource exhaustion can stop the conversion process without affecting data confidentiality or integrity.

CVSS severity8.7
High
EPSS probability0.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Remarshal before 0.17.1 allows remote attackers to interrupt conversion using crafted YAML aliases. The YAML conversion path recursively traverses expanded anchor aliases without limiting the resulting node count. Exploitation requires a deployment that accepts attacker-supplied YAML; resource exhaustion can stop the conversion process without affecting data confidentiality or integrity.

The record

CVE
CVE-2023-47163
Published
Nov 13, 2023
Updated
Jan 8, 2025
Vendor
Remarshal Project
Product
Remarshal
Classifications
CWE-674, CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=prior to v0.17.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Remarshal Project · Remarshalversion=prior to v0.17.1

Published CVSS scores

8.7GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-674Uncontrolled Recursion
CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

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

Technologies

Your stack

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Your stack

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