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

Quick assessment

Affected
adnanh webhook
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Webhook 在 2.8.3 及更早版本中，在评估触发规则之前会将整个请求体读入内存，这使得未经身份验证的攻击者可以通过发送过大的请求体来耗尽内存。攻击者可以发送带有无效签名的多吉字节大小的请求体，从而触发内存溢出条件并导致服务崩溃。

CVSS 7.5 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
adnanh webhook ≤ 2.8.3 affected
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I. Basic Information for CVE-2026-91080

Vulnerability Information
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Vulnerability Title
webhook through 2.8.3 Memory Exhaustion via Oversized Request Body
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
adnanh webhook 0 ~ 2.8.3 -

II. Public POCs for CVE-2026-91080

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-91080

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Vendor Advisories for CVE-2026-91080 (1)

Proof of Concept for CVE-2026-91080 (1)

Other References for CVE-2026-91080 (1)

IV. Related Vulnerabilities

Same weakness: CWE-770

V. Comments for CVE-2026-91080

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