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TI-2026-29232 Aliases CVE-2026-40481GHSA-v7xq-3wx6-fqc2

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

Priority HIGH 75CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00447 39th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed monetr (monetr): 1.12.4github.com/monetr/monetr (Go): 1.12.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
monetrmonetrbefore 1.12.41.12.4Patch availableCNA
—github.com/monetr/monetr (Go)before 1.12.41.12.4Patch availableGHSA-v7xq-3wx6-fqc2
  • monetr Vendormonetr Affected before 1.12.4 Fixed in 1.12.4 Patch available CNA
  • github.com/monetr/monetr (Go) Vendor— Affected before 1.12.4 Fixed in 1.12.4 Patch available GHSA-v7xq-3wx6-fqc2

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:monetr:monetr:*:*:*:*:*:*:*:*before 1.12.4Vulnerablemonetr
  • cpe:2.3:a:monetr:monetr:*:*:*:*:*:*:*:* Versions before 1.12.4 Vulnerable ·monetr

Remediation

  • Fix · CNA monetr (monetr) Fixed in 1.12.4
  • Fix · GHSA-v7xq-3wx6-fqc2 github.com/monetr/monetr (Go) Fixed in 1.12.4 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40481
  2. 2026-10-03 Alias added: GHSA-v7xq-3wx6-fqc2

References

Exploit 1

Advisory 1

Other 2

  • TI-2026-30163 monetr is vulnerable to server-side request forgery in Lunch Flow link creation and refresh CVSS 4.0HIGH 8.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences