CVE-2026-61911An issue was discovered in Cyrus IMAP before 3.12.4.
Updated under an hour ago ()
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It affects cyrusimap Cyrus IMAP and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
An issue was discovered in Cyrus IMAP before 3.12.4. There is a Sieve mailbox existence oracle. An authenticated user could install a Sieve script that probed whether another user's private mailbox existed, or read the value of shared mailbox annotations, by observing which fileinto branch fired during LMTP delivery.
- CVSS
- 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-497
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- mitre
- NVD analysis
- Analyzed
- Record last updated
- Sep 10, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
cyrusimap Cyrus IMAP cyrusimap:cyrus_imap (from the name) | before 3.8.8; from 3.9.0 before 3.10.4; from 3.11.0 before 3.12.4 | CNA record |
cyrus imap cyrus:imap | before 3.8.8; from 3.9.0 before 3.10.4; from 3.11.0 before 3.12.4 | NVD |
References
- https://cyrusimap.orgproduct
- https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.4.htmlrelease-notes
- https://www.cyrusimap.org/3.12/imap/download/release-notes/3.10/x/3.10.4.htmlrelease-notes
- https://www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.htmlrelease-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.