CVE-2026-76239Public exploitNetwork attack vector

Blind SSRF via unvalidated webhook delivery_address

Published Aug 19, 2026 · Updated Aug 19, 2026

Server-side request forgery in Eidetic Labs Stigmem before 0.9.0a11 allows remote authenticated users to reach internal HTTP services. SubscriptionCreateRequest accepts delivery_address as a plain string, the create route stores it directly, and the subscription delivery worker later passes the stored URL to httpx.Client.post() without calling the existing assert_safe_url() SSRF guard. Reachability requires an authenticated account plus a matching fact-change event, and the result is a blind SSRF primitive against loopback, private-network, and similar internal endpoints reachable from the Stigmem server.

CVSS severity6.3
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Eidetic Labs Stigmem before 0.9.0a11 allows remote authenticated users to reach internal HTTP services. SubscriptionCreateRequest accepts delivery_address as a plain string, the create route stores it directly, and the subscription delivery worker later passes the stored URL to httpx.Client.post() without calling the existing assert_safe_url() SSRF guard. Reachability requires an authenticated account plus a matching fact-change event, and the result is a blind SSRF primitive against loopback, private-network, and similar internal endpoints reachable from the Stigmem server.

The record

CVE
CVE-2026-76239
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
Eidetic Labs
Product
Stigmem
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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 <0.9.0a11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Eidetic Labs · Stigmemversion=0 <0.9.0a11

Published CVSS scores

5.3CVE ProgramCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
6.3CVE ProgramCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

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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