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OpenAdvisories
High · 8.2 CVE-2026-40481 EUVD-2026-23591GHSA-v7xq-3wx6-fqc2GO-2026-5654

monetr: Unauthenticated Stripe webhook reads attacker-sized request bodies before signature validation

Published Apr 17, 2026 · Updated Apr 20, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
monetr monetr < 1.12.4 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 govulncheck-vulndb 0.0.20260723T184607-160000.1.1 openSUSE-SU-2026:21483-1

Affected packages

EcosystemPackageAffectedFixedRecord
Go github.com/monetr/monetr < 1.12.4 1.12.4 GHSA-v7xq-3wx6-fqc2

Advisories 1

References