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undici Denial of Service attack via bad certificate data

Low severity GitHub Reviewed Published May 15, 2025 in nodejs/undici • Updated May 16, 2025

Package

npm undici (npm)

Affected versions

< 5.29.0
>= 6.0.0, < 6.21.2
>= 7.0.0, < 7.5.0

Patched versions

5.29.0
6.21.2
7.5.0

Description

Impact

Applications that use undici to implement a webhook-like system are vulnerable. If the attacker set up a server with an invalid certificate, and they can force the application to call the webhook repeatedly, then they can cause a memory leak.

Patches

This has been patched in nodejs/undici#4088.

Workarounds

If a webhook fails, avoid keep calling it repeatedly.

References

Reported as: nodejs/undici#3895

References

@mcollina mcollina published to nodejs/undici May 15, 2025
Published to the GitHub Advisory Database May 15, 2025
Reviewed May 15, 2025
Published by the National Vulnerability Database May 15, 2025
Last updated May 16, 2025

Severity

Low

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(12th percentile)

Weaknesses

Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. Learn more on MITRE.

CVE ID

CVE-2025-47279

GHSA ID

GHSA-cxrh-j4jr-qwg3

Source code

Credits

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