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CVE-2020-5423

Cloud Controller is vulnerable to denial of service via YAML parsing

HIGH
7.5
CVSS Score
Published: December 2, 2020 at 01:55 AM UTC
Updated: June 17, 2026 at 03:21 AM UTC
2 products affected across 1 vendorCF DeploymentCapi Release

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Severity
HIGH7.5
Exploit prediction
EPSS 1%

Description

CAPI (Cloud Controller) versions prior to 1.101.0 are vulnerable to a denial-of-service attack in which an unauthenticated malicious attacker can send specially-crafted YAML files to certain endpoints, causing the YAML parser to consume excessive CPU and RAM.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Capi Release· Cloudfoundry
95%
v < 1.101.0
Affected range stops below 1.101.0, so it looks safe — our inference, not a vendor statement
CF Deployment· Cloudfoundry
95%
v < 15.0.0
Affected range stops below 15.0.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.cloudfoundry.org/blog/cve-2020-5423

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

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