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TI-2026-34690 Aliases CVE-2026-47088GHSA-f77j-qm5m-p6cw

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2.

Priority LOW 15CWE-126Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Partial Red Hat: 5 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-126 and the CVSS impact.

Summary

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash. When parsing the message, the server would read past the message's end in memory, and read into the heap, returning the read content to the user.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00265 18th percentileScored 2026-11-07
Fix Partial Cyrus IMAP (cyrusimap): 3.12.3Red Hat: 5 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
cyrusimapCyrus IMAPbefore 3.12.33.12.3Patch availableCNA
  • Cyrus IMAP Vendorcyrusimap Affected before 3.12.3 Fixed in 3.12.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:cyrus:imap:*:*:*:*:*:*:*:*——Cyrus
  • cpe:2.3:a:cyrus:imap:*:*:*:*:*:*:*:* Versions — — ·Cyrus

Remediation

  • Fix · CNA Cyrus IMAP (cyrusimap) Fixed in 3.12.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    cyrusimap Cyrus IMAP 3.12.3

    9 records Highest priority Priority LOW 9 LOW

    Other records, highest priority first

    • TI-2026-34686 Incorrect authorization in cyrusimap Cyrus IMAPPriority LOW 29
    • TI-2026-34684 Incorrect authorization in cyrusimap Cyrus IMAPPriority LOW 24
    • TI-2026-34691 Missing authorization in cyrusimap Cyrus IMAPPriority LOW 20
    Show all 9 records →

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-47088
  2. 2026-10-03 Alias added: GHSA-f77j-qm5m-p6cw

References

Other 2

  • TI-2002-01271 Multiple buffer overflows in Cyrus SASL library 2.1.9 and earlier allow remote attackers… CVSS 3.1CRITICAL 9.8
  • TI-2022-08283 In Cyrus SASL 2.1.17 through 2.1.27 before 2.1.28, plugins/sql.c does not escape the… CVSS 3.1HIGH 8.8
  • TI-2019-14353 cyrus-sasl (aka Cyrus SASL) 2.1.27 has an out-of-bounds write leading to unauthenticated… CVSS 3.1HIGH 7.5
  • TI-2026-44296 Double free in cyrusimap Cyrus IMAP CVSS 3.1HIGH 7.1
  • TI-2017-09510 Cyrus IMAP before 3.0.3 allows remote authenticated users to write to arbitrary files via… CVSS 3.0MEDIUM 6.5
  • TI-2024-22515 Cyrus IMAP before 3.8.3 and 3.10.x before 3.10.0-rc1 allows authenticated attackers to… CVSS 3.1MEDIUM 6.5
See all 19 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences