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PatchSiren cyber security CVE debrief

CVE-2026-47088 cyrusimap CVE debrief

CVE-2026-47088 is a low-severity vulnerability in Cyrus IMAP through 3.12.2, caused by improper parsing of nested MIME comments. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash, leading to heap exposure. This vulnerability has a CVSS score of 3.1 and is classified as LOW severity. The CVE record was published on 2026-07-16T19:16:49.513Z and has not been modified since then.

Vendor
cyrusimap
Product
Cyrus IMAP
CVSS
LOW 3.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-16
Original CVE updated
2026-07-17
Advisory published
2026-07-16
Advisory updated
2026-07-17

Who should care

Users of Cyrus IMAP through version 3.12.2 should be aware of this vulnerability and take necessary precautions. This includes administrators and users who have access to the IMAP service and may be impacted by the vulnerability.

Technical summary

The vulnerability in Cyrus IMAP through 3.12.2 is caused by improper parsing of nested MIME comments. An authenticated IMAP user could exploit this by crafting a malicious email message with an RFC 822 comment ending with a backslash, potentially leading to heap exposure. This issue was discovered in cyrus-imapd. The vulnerability has a CVSS score of 3.1 and is classified as LOW severity. Users of Cyrus IMAP through version 3.12.2 should be aware of this vulnerability and take necessary precautions to prevent exploitation. The CVE record was published on 2026-07-16T19:16:49.513Z and has not been modified since then.

Defensive priority

Low

Recommended defensive actions

  • Inventory and verify Cyrus IMAP version
  • Restrict access to IMAP service
  • Monitor for suspicious email activity
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-07-16T19:16:49.513Z and has not been modified since then. The NVD entry is currently in the 'Received' status. This information is based on the supplied source corpus and may not reflect the full scope or details of the vulnerability. Users should verify the information with the official CVE record and NVD entry for the most up-to-date and accurate information.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-47088 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-47088

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-47088 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-47088

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.