CVEvulnerability

CVE-2026-61908

6.5 MEDIUM Published 2026-09-09 Modified 2026-09-16 Official page ↗
Status
Analyzed
Published
2026-09-09
Last modified
2026-09-16
Assigner
[email protected]
CVSS 3.1 ([email protected])
3.1 LOW — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-125

Description

An issue was discovered in Cyrus IMAP before 3.12.4. A JMAP email-header blob ID can reference an out-of-bounds index. An authenticated user could attempt to download a crafted JMAP blob ID of the form H<emailid>-<index>, which could read past the end of the internal blob_headers array during download, exposing adjacent heap memory.

Affected configurations

• cyrus imap (< 3.8.8) • cyrus imap (>= 3.9.0 < 3.10.4) • cyrus imap (>= 3.11.0 < 3.12.4)

Related

Weakness · CWE (1)

  • CWE-125 Out-of-bounds Read weakness

References