High 7.5Published Sep 14, 2026

CVE-2026-91080webhook through 2.8.3 Memory Exhaustion via Oversized Request Body

Updated under an hour ago (2026-10-19 08:23 UTC)

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It affects adnanh webhook. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for adnanh webhook

Exploited in the last 30 days

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: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Sep 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

adnanh webhook adnanh:webhook (from the name)	through 2.8.3	CNA record

References

https://github.com/adnanh/webhook/issues/756issue-tracking
https://github.com/adnanh/webhookproduct
https://github.com/adnanh/webhook/blob/2.8.3/webhook.gotechnical-description
https://www.vulncheck.com/advisories/webhook-through-2.8.3-memory-exhaustion-via-oversized-request-bodythird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.