medium6.3
CVE-2026-76239
Stigmem before 0.9.0a11 fails to validate the delivery_address parameter when creating webhook subscriptions, allowing authenticated users to specify internal …
Impact
Stigmem before 0.9.0a11 fails to validate the delivery_address parameter when creating webhook subscriptions, allowing authenticated users to specify internal loopback and private network destinations. Attackers can trigger matching fact-change events to cause the Stigmem server to issue server-side HTTP POST requests to internal services, enabling blind SSRF attacks against localhost and private network endpoints.
Affected products
| Product | Affected versions |
|---|---|
| Stigmem | before 0.9.0a11 |
Versions were read from the advisory text. No structured product data has been published for this record yet.