CVE-2026-91080
webhook through 2.8.3 Memory Exhaustion via Oversized Request Body
- State
- Published
- Severity
- 8.7 High
- Published
- Sep 14, 2026
- Updated
- Sep 24, 2026
- Reserved
- Sep 14, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-770 Allocation of Resources Without Limits or Throttling
Affected Products
| Product | Versions |
|---|---|
webhookadnanh |
|
References
- GitHub Issue #756issue-tracking
- https://github.com/adnanh/webhookproduct
- webhook.go at 2.8.3technical-description
- VulnCheck Advisory: webhook through 2.8.3 Memory Exhaustion via Oversized Request Bodythird-party-advisory
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