CVE-2026-47085

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{"bugzilla": {"description": "cyrus-imapd: Cyrus IMAP: Information disclosure via URLAUTH token forgery", "id": "2501446", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2501446"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.0", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-341", "details": ["An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. URLAUTH token forgery can occur via a missing mboxkey. If an attacker knew a folder name on the victim's account for which the victim had never issued an auth URL, they could forge a working URLAUTH token by computing an HMAC-SHA1 value with a predictable key, giving them read access to the mailbox. (URLAUTH is an obscure feature, meaning that the odds of any user actually being susceptible to this attack are very low. Perhaps no public clients use URLAUTH.)", "A flaw was found in Cyrus IMAP (cyrus-imapd). A remote attacker could exploit a vulnerability related to URLAUTH token forgery, caused by a missing mailbox key. This could allow the attacker to gain unauthorized read access to a victim's mailbox. The likelihood of exploitation is low due to the obscurity of the URLAUTH feature."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-47085", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Under investigation", "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": "Out of support scope", "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": "Under investigation", "package_name": "cyrus-imapd", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-47085\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-47085\nhttps://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.3.html\nhttps://www.cyrusimap.org/imap/download/release-notes/index.html"], "statement": "Moderate: A flaw in Cyrus IMAP (cyrus-imapd) allows for URLAUTH token forgery due to a missing mailbox key, potentially granting a remote attacker unauthorized read access to a victim's mailbox. The impact is limited as the URLAUTH feature is obscure and rarely used, significantly reducing the likelihood of exploitation in typical Red Hat deployments.", "threat_severity": "Moderate"}

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