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 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/adnanh/webhook
https://github.com/adnanh/webhook/blob/2.8.3/webhook.go
https://github.com/adnanh/webhook/issues/756
https://www.vulncheck.com/advisories/webhook-through-2.8.3-memory-exhaustion-via-oversized-request-body
https://github.com/adnanh/webhook/issues/756

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-14 18:20

Updated : 2026-09-14 19:18

NVD link : CVE-2026-91080

Mitre link : CVE-2026-91080

CVE.ORG link : CVE-2026-91080

JSON object : View

Products Affected

No product.

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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