CVE-2026-61908

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Source
https://cve.org/CVERecord?id=CVE-2026-61908
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61908.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-61908
Downstream
Related
Published
2026-09-09T00:00:00Z
Modified
2026-09-25T18:26:53Z
Severity
  • 3.1 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
[none]
Details

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-, which could read past the end of the internal blob_headers array during download, exposing adjacent heap memory.

Database specific 
{
    "cna_assigner":  "mitre",
    "cwe_ids":  [
        "CWE-125"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61908.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "fixed":  "3.8.8"
                },
                {
                    "introduced":  "3.9.0"
                },
                {
                    "fixed":  "3.10.4"
                },
                {
                    "introduced":  "3.11.0"
                },
                {
                    "fixed":  "3.12.4"
                }
            ],
            "source":  "AFFECTED_FIELD"
        },
        {
            "extracted_events":  [
                {
                    "fixed":  "3.8.8"
                },
                {
                    "introduced":  "3.9.0"
                },
                {
                    "fixed":  "3.10.4"
                },
                {
                    "introduced":  "3.11.0"
                },
                {
                    "fixed":  "3.12.4"
                }
            ],
            "source":  "CPE_FIELD"
        },
        {
            "extracted_events":  [
                {
                    "fixed":  "3.12.4"
                }
            ],
            "source":  "DESCRIPTION"
        }
    ]
}
References

Affected packages

Git / github.com/cyrusimap/cyrus-imapd

Affected ranges

Type
GIT
Repo
https://github.com/cyrusimap/cyrus-imapd
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
08031fd42e027bdb5bc286e428a03e1c53c2e105
Fixed
ad6d4e67d0edbdf99e7ce31658c67640f30479c4
Fixed
f8ffbe4a87455c591fe355b03a2713a50f8441ab
Database specific
Show details 
{
    "cpe":  "cpe:2.3:a:cyrus:imap:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "3.8.8"
        },
        {
            "introduced":  "3.9.0"
        },
        {
            "fixed":  "3.10.4"
        },
        {
            "introduced":  "3.11.0"
        },
        {
            "fixed":  "3.12.4"
        }
    ],
    "source":  "CPE_RANGE"
}

Affected versions

cyrus-imapd-2.*
cyrus-imapd-2.4.0
cyrus-imapd-2.4.1
cyrus-imapd-2.4.2
cyrus-imapd-2.5-snapshot-autoconf-and-automake
cyrus-imapd-3.*
cyrus-imapd-3.0.0-beta1
cyrus-imapd-3.0.0-beta2
cyrus-imapd-3.0.0-beta3
cyrus-imapd-3.0.0-beta4
cyrus-imapd-3.0.0-beta5
cyrus-imapd-3.0.0-beta6
cyrus-imapd-3.0.0-rc1
cyrus-imapd-3.0.0-rc2
cyrus-imapd-3.0.0-rc3
cyrus-imapd-3.0.0-rc4
cyrus-imapd-3.1.0-dev
cyrus-imapd-3.1.1
cyrus-imapd-3.1.2
cyrus-imapd-3.1.3
cyrus-imapd-3.1.4
cyrus-imapd-3.1.5
cyrus-imapd-3.1.6
cyrus-imapd-3.1.7
cyrus-imapd-3.1.8
cyrus-imapd-3.1.9
cyrus-imapd-3.10.0
cyrus-imapd-3.10.0-alpha0
cyrus-imapd-3.10.0-beta1
cyrus-imapd-3.10.0-beta2
cyrus-imapd-3.10.0-rc1
cyrus-imapd-3.10.0-rc2
cyrus-imapd-3.10.1
cyrus-imapd-3.10.2
cyrus-imapd-3.10.3
cyrus-imapd-3.11.0-alpha0
cyrus-imapd-3.12.0
cyrus-imapd-3.12.0-alpha0
cyrus-imapd-3.12.0-beta1
cyrus-imapd-3.12.0-beta2
cyrus-imapd-3.12.0-rc1
cyrus-imapd-3.12.1
cyrus-imapd-3.12.2
cyrus-imapd-3.12.3
cyrus-imapd-3.3.0
cyrus-imapd-3.3.0-dev0
cyrus-imapd-3.3.1
cyrus-imapd-3.5.0-alpha0
cyrus-imapd-3.7.0-alpha0
cyrus-imapd-3.8.0
cyrus-imapd-3.8.0-alpha0
cyrus-imapd-3.8.0-beta1
cyrus-imapd-3.8.0-beta2
cyrus-imapd-3.8.0-rc1
cyrus-imapd-3.8.1
cyrus-imapd-3.8.2
cyrus-imapd-3.8.3
cyrus-imapd-3.8.4
cyrus-imapd-3.8.5
cyrus-imapd-3.8.6
cyrus-imapd-3.8.7
cyrus-imapd-3.9.0-alpha0
Other
posttab
pretab

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61908.json"