CVE-2023-26108Network attack vector

Resource retention via canceled StreamableFile responses

Published Mar 6, 2023 · Updated Mar 5, 2025

Resource leak in NestJS @nestjs/core before 9.0.5 allows remote attackers to retain StreamableFile backing streams by canceling requests. ExpressAdapter passes the source stream to stream.pipe(response), which does not destroy that source when the HTTP response closes or errors. Reachability requires an Express application endpoint returning StreamableFile; pooled upstream streams can retain sockets and leave dependent requests hanging.

CVSS severity5.3
Medium
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leak in NestJS @nestjs/core before 9.0.5 allows remote attackers to retain StreamableFile backing streams by canceling requests. ExpressAdapter passes the source stream to stream.pipe(response), which does not destroy that source when the HTTP response closes or errors. Reachability requires an Express application endpoint returning StreamableFile; pooled upstream streams can retain sockets and leave dependent requests hanging.

The record

CVE
CVE-2023-26108
Published
Mar 6, 2023
Updated
Mar 5, 2025
Vendor
NestJS
Product
@nestjs/core
Classifications
CWE-200, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 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=0 <9.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NestJS · @nestjs/coreversion=0 <9.0.5

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.7SnykCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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