TI-2026-44296 Aliases CVE-2026-61915 GHSA-jxhj-wr2q-m255

Double free in cyrusimap Cyrus IMAP

LOW 31CWE-415Published 2026-09-09 · Updated 2026-09-10

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

An issue was discovered in Cyrus IMAP before 3.12.4. There is a VPATCH BYPARAM double-free. An authenticated calendar user could crash a Cyrus CalDAV worker with a PATCH containing PATCH-ACTION="BYPARAM@..." against a resource with two or more properties of the matched kind. The memory holding the selector would be freed once on each iteration over the properties.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00259 17th percentileScored 2026-11-07

Fix Partial Cyrus IMAP (cyrusimap): 3.8.8, 3.10.4, 3.12.4Red 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

Vendor	Product	Affected versions	Fixed in	Status	Source
cyrusimap	Cyrus IMAP	before 3.8.8; 3.9.0 to before 3.10.4; 3.11.0 to before 3.12.4	3.8.8, 3.10.4, 3.12.4	Patch available	CNA

Cyrus IMAP Vendorcyrusimap Affected before 3.8.8; 3.9.0 to before 3.10.4; 3.11.0 to before 3.12.4 Fixed in 3.8.8, 3.10.4, 3.12.4 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:cyrus:imap::::::::	before 3.8.8; 3.9.0 to before 3.10.4; 3.11.0 to before 3.12.4	Vulnerable	Cyrus

cpe:2.3:a:cyrus:imap:*:*:*:*:*:*:*:* Versions before 3.8.8; 3.9.0 to before 3.10.4; 3.11.0 to before 3.12.4 Vulnerable ·Cyrus

Remediation

Fix · CNA Cyrus IMAP (cyrusimap) Fixed in 3.8.8, 3.10.4, 3.12.4

Fixed in the same release

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

Release · 2026-09-09
cyrusimap Cyrus IMAP 3.10.4, 3.12.4, 3.8.8
6 records Highest priority Priority LOW 6 LOW
Other records, highest priority first
- TI-2026-44292 Out-of-bounds read in cyrusimap Cyrus IMAPPriority LOW 28
- TI-2026-44294 Incorrect authorization in cyrusimap Cyrus IMAPPriority LOW 22
- TI-2026-44295 An issue was discovered in Cyrus IMAP before 3.12.4.Priority LOW 19
Show all 6 records →

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 7	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-61915
2026-10-03 Alias added: GHSA-jxhj-wr2q-m255

References

Other 4

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-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
TI-2026-34686 Incorrect authorization in cyrusimap Cyrus IMAP 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