CVE-2026-67183Public exploitNetwork attack vector

Service interruption via unreleased HTTP request objects

Published Jul 28, 2026 · Updated Jul 28, 2026

Memory leakage in TinyWeb 0.0.8 allows remote attackers to exhaust worker memory through ordinary well-formed HTTP requests. HttpParser::execute() allocates Url, HttpHeaders, and per-line HttpHeader objects with raw new expressions, while missing destructors and an unreachable delete path leave them allocated. Remote attackers need only reach the listening TCP port; sustained traffic grows worker memory until the worker is killed.

CVSS severity8.7
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Memory leakage in TinyWeb 0.0.8 allows remote attackers to exhaust worker memory through ordinary well-formed HTTP requests. HttpParser::execute() allocates Url, HttpHeaders, and per-line HttpHeader objects with raw new expressions, while missing destructors and an unreachable delete path leave them allocated. Remote attackers need only reach the listening TCP port; sustained traffic grows worker memory until the worker is killed.

The record

CVE
CVE-2026-67183
Published
Jul 28, 2026
Updated
Jul 28, 2026
Vendor
GeneralSandman
Product
TinyWeb
Classifications
CWE-401, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.0.8
  2. Affected versionversion=e48f15d38d2bebeec9cabcfdde81931b10a1963b <=a381da252fe8e873c8aff22703040426cc9b2ae0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GeneralSandman · TinyWebversion=0.0.8; version=e48f15d38d2bebeec9cabcfdde81931b10a1963b <=a381da252fe8e873c8aff22703040426cc9b2ae0

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5VulnCheckCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499.003Application Exhaustion Flood

Public exploit references

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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