CVE-2022-39294Network attack vector

Server crash via unchecked request length

Published Oct 31, 2022 · Updated Apr 23, 2025

Denial of service in conduit-hyper before 0.4.2 allows remote attackers to crash the server process via an oversized Content-Length header. The request path passes the declared body size to hyper::body::to_bytes without a limit, which can trigger a failed allocation and panic. The application must expose the embedded server without an upstream request-size limit; successful exploitation interrupts the hosting process.

CVSS severity7.5
High
EPSS probability0.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in conduit-hyper before 0.4.2 allows remote attackers to crash the server process via an oversized Content-Length header. The request path passes the declared body size to hyper::body::to_bytes without a limit, which can trigger a failed allocation and panic. The application must expose the embedded server without an upstream request-size limit; successful exploitation interrupts the hosting process.

The record

CVE
CVE-2022-39294
Published
Oct 31, 2022
Updated
Apr 23, 2025
Vendor
conduit-rust
Product
conduit-hyper
Classifications
CWE-400, CWE-1284, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 31, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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=>= 0.2.0-alpha.3, < 0.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

conduit-rust · conduit-hyperversion=>= 0.2.0-alpha.3, < 0.4.2

Published CVSS scores

7.5GitHubCVSS: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CWE-1284Improper Validation of Specified Quantity in Input
T1499Endpoint Denial of Service

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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