CVE-2026-61908

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{"bugzilla": {"description": "cyrus-imapd: cyrus-imapd: JMAP email-header blob ID out-of-bounds index", "id": "2526304", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526304"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in cyrus-imapd. An authenticated user could exploit this vulnerability by attempting to download a specially crafted JMAP (JSON Meta Application Protocol) blob ID. This action could lead to reading beyond the intended memory boundary, potentially exposing sensitive information from adjacent heap memory."], "mitigation": {"lang": "en:us", "value": "To reduce the attack surface, restrict network access to the `cyrus-imapd` service to trusted clients or internal networks using firewall rules. For example, using `firewalld`:\n`sudo firewall-cmd --permanent --add-rich-rule='rule family=\"ipv4\" source address=\"<TRUSTED_NETWORK>\" port port=\"imap\" protocol=\"tcp\" accept'`\n`sudo firewall-cmd --reload`\nThis may impact legitimate users who require remote access to the IMAP service. A service restart may be required for changes to take full effect."}, "name": "CVE-2026-61908", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "cyrus-imapd", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "cyrus-imapd", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "cyrus-imapd", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "cyrus-imapd", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "cyrus-imapd", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-09-10T07:41:48Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-61908\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-61908"], "threat_severity": "Moderate"}

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