Resource exhaustion in Adnanh Webhook
CVE-2026-91080
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 invalid signatures to trigger out-of-memory conditions and crash the service.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (issue-tracking)
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-91080?
- CVE-2026-91080 is a high-severity vulnerability in Adnanh Webhook, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-09-14.
- How severe is CVE-2026-91080?
- High severity. CVSS v3 base score is 7.5 out of 10.