CVE-2026-91080 Webhook - Denial of Service

Webhook <= 2.8.3 contains a denial of service caused by reading entire request bodies into memory before evaluating trigger rules, letting unauthenticated attackers exhaust memory and crash the service, exploit requires sending oversized request bodies.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.66% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
14 September 2026
Updated
15 October 2026
Weakness
CWE-770

Vendor fix

Update to the latest version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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