CVE-2026-76243Network attack vector

Unauthenticated data access via disabled authentication

Published Aug 19, 2026 · Updated Aug 25, 2026

Improper authorization in Eidetic Labs Stigmem 0.9.0a1 allows remote attackers to read and write node data without authentication. The node startup path accepts STIGMEM_AUTH_REQUIRED=false with a non-loopback bind and assigns anonymous requests broad read, write, and federation capabilities. Exploitation requires an operator-disabled authentication setting and network exposure beyond a loopback-only development environment.

CVSS severity9.2
Critical
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Eidetic Labs Stigmem 0.9.0a1 allows remote attackers to read and write node data without authentication. The node startup path accepts STIGMEM_AUTH_REQUIRED=false with a non-loopback bind and assigns anonymous requests broad read, write, and federation capabilities. Exploitation requires an operator-disabled authentication setting and network exposure beyond a loopback-only development environment.

The record

CVE
CVE-2026-76243
Published
Aug 19, 2026
Updated
Aug 25, 2026
Vendor
Eidetic Labs
Product
Stigmem
Classifications
CWE-285, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record 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 <0.9.0a2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Eidetic Labs · Stigmemversion=0 <0.9.0a2

Published CVSS scores

9.2Eidetic LabsCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-285Improper Authorization
T1190Exploit Public-Facing Application

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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