{"id":"CVE-2026-76239","summary":"Stigmem before 0.9.0a11 SSRF via unvalidated webhook delivery_address","details":"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.","aliases":["GHSA-5p3m-vhh6-9236"],"modified":"2026-08-23T03:42:34.983338837Z","published":"2026-08-19T14:02:17.336Z","database_specific":{"cwe_ids":["CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76239.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76239.json"},{"type":"ADVISORY","url":"https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-5p3m-vhh6-9236"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-76239"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/stigmem-before-0a11-ssrf-via-unvalidated-webhook-delivery-address"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/eidetic-labs/stigmem","events":[{"introduced":"0"},{"fixed":"11637401d50629fef040382aee5af4571842c152"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"0.9.0a11"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["v0.9.0a10","v0.9.0a9","v0.9.0a8","v0.9.0a7","v0.9.0a6","v0.9.0a5","v0.9.0a4","v0.9.0a3","v0.9.0a2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-76239.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N"}]}