CVE-2026-67184Public exploitNetwork attack vector

Unauthenticated server outage via NULL pointer dereference

Published Jul 28, 2026 · Updated Jul 28, 2026

Null pointer dereference in GeneralSandman TinyWeb 0.0.8 and earlier allows remote attackers to crash workers via malformed HTTP requests. HttpParser::execute() returns after invalid HTTP-version parsing without allocating the request Url, yet WebProtocol::dataReceived() still calls buildResponse(), which dereferences the NULL pointer. No credentials or user interaction are required; repeated requests exhaust the worker pool and leave the server offline until manually restarted.

CVSS severity8.7
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in GeneralSandman TinyWeb 0.0.8 and earlier allows remote attackers to crash workers via malformed HTTP requests. HttpParser::execute() returns after invalid HTTP-version parsing without allocating the request Url, yet WebProtocol::dataReceived() still calls buildResponse(), which dereferences the NULL pointer. No credentials or user interaction are required; repeated requests exhaust the worker pool and leave the server offline until manually restarted.

The record

CVE
CVE-2026-67184
Published
Jul 28, 2026
Updated
Jul 28, 2026
Vendor
GeneralSandman
Product
TinyWeb
Classifications
CWE-476, T1499.004
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

7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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

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-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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