CVE-2023-50694Network attack vector

Request smuggling via ambiguous HTTP message framing

Published Jan 19, 2024 · Updated Jun 17, 2025

HTTP request smuggling in dom96 HTTPbeast 0.4.1 and earlier allows remote attackers to inject crafted requests into HTTP connections. The parser.nim framing logic uses Content-Length to delimit request bodies and treats remaining bytes as pipelined requests, enabling discrepant parsers to expose a second request. A reachable HTTP/1.1 deployment with inconsistent intermediary parsing is required; consequences include unauthorized access, cache poisoning, or service interruption.

CVSS severity9.8
Critical
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTTP request smuggling in dom96 HTTPbeast 0.4.1 and earlier allows remote attackers to inject crafted requests into HTTP connections. The parser.nim framing logic uses Content-Length to delimit request bodies and treats remaining bytes as pipelined requests, enabling discrepant parsers to expose a second request. A reachable HTTP/1.1 deployment with inconsistent intermediary parsing is required; consequences include unauthorized access, cache poisoning, or service interruption.

The record

CVE
CVE-2023-50694
Published
Jan 19, 2024
Updated
Jun 17, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

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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-20Improper Input Validation
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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