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CVE-2026-40481

High

Description

monetr is a budgeting application for recurring expenses. In versions 1.12.3 and below, the public Stripe webhook endpoint buffers the entire request body into memory before validating the Stripe signature. A remote unauthenticated attacker can send oversized POST payloads to cause uncontrolled memory growth, leading to denial of service. The issue affects deployments with Stripe webhooks enabled and is mitigated if an upstream proxy enforces a request body size limit. This issue has been fixed in version 1.12.4.

SeverityHigh
CVSS7.5
Exploit probability—
ProductMonetr
PublishedApr 17, 2026
First seenApr 17, 2026
Weakness typeCWE-400Uncontrolled resource consumption

How to fix

Update
  • monetr monetr1.12.4 or later
  • github.com/monetr/monetr1.12.4 or later

Affected products

ProductAffected versionsFixed in
monetr monetrv < 1.12.41.12.4
github.com/monetr/monetrGov < 1.12.41.12.4

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