{"id":"CVE-2026-91080","title":"webhook through 2.8.3 reads the entire request body into memory before evaluating trigger rules, allowing unauthenticated attackers to exhaust memory by sending oversized bodies","summary":"webhook through 2.8.3 reads the entire request body into memory before evaluating trigger rules, allowing unauthenticated attackers to exhaust memory by sending oversized bodies. Attackers can send multi-gigabyte request bodies with inva…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770"],"vendor":"adnanh","product":"webhook","affected":["webhook <= 2.8.3"],"published":"2026-09-14","updated":"2026-09-23","sourceUpdated":"2026-09-23T17:17:44.733","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-91080","references":[{"url":"https://github.com/adnanh/webhook","label":"disclosure@vulncheck.com"},{"url":"https://github.com/adnanh/webhook/blob/2.8.3/webhook.go","label":"disclosure@vulncheck.com"},{"url":"https://github.com/adnanh/webhook/issues/756","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/webhook-through-2.8.3-memory-exhaustion-via-oversized-request-body","label":"disclosure@vulncheck.com"},{"url":"https://github.com/adnanh/webhook/issues/756","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00591,"epssPercentile":0.47001,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-14T19:09:17.000105Z"},"ingestedAt":"2026-09-14T19:13:23.464Z","slug":"CVE-2026-91080","body":"## Overview\n\nwebhook through 2.8.3 reads the entire request body into memory before evaluating trigger rules, allowing unauthenticated attackers to exhaust memory by sending oversized bodies. Attackers can send multi-gigabyte request bodies with invalid signatures to trigger out-of-memory conditions and crash the service.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":203278,"id":"CVE-2026-91080","ts":1789416905523,"field":"exploit_available","old":"false","new":"true"}]}