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Highest advisory severityMedium 1 vendor · 1 advisory

CVE-2026-47086

CVE-2026-47086: 1 tracked advisory record across Red Hat. Compare source-reported impact, fixes and remediation.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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Red Hat

1 advisory
  • Advisory severityMedium4.3

    Medium [CVE-2026-47086] Information disclosure via URLAUTH token bypass of Access Control Lists

    CVE-2026-47086Source published Source updated

    An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. GENURLAUTH-issued tokens can bypass ACLs. Any authenticated user could mint a URLAUTH token (via the GENURLAUTH command) for any mailbox they could name, even without read access on it. This would allow reading mail from mailboxes despite having no granted permissions. This allows bypassing Access Control Lists (ACLs), which are rules that control access to mailboxes. Consequently, an attacker could read mail from any mailbox, even without having been granted explicit read permissions. This flaw in cyrus-imapd allows an authenticated attacker to bypass Access Control Lists (ACLs) by minting a URLAUTH token via the GENURLAUTH command. Red Hat severity: Moderate — CVSS 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N).…

    Affected products in this advisory
    • Red Hat Enterprise Linux 10
    • Red Hat Enterprise Linux 6
    • Red Hat Enterprise Linux 7
    • Red Hat Enterprise Linux 8

    2 more entries in the full advisory.

    Source-reported affected versions
    • 3.12.2
    Source-reported fixed versions
    No fixed-version detail extracted. This does not mean no fix exists.
    Mitigation guidance
    • To reduce the attack surface, restrict network access to the Cyrus IMAP server to only trusted clients and networks by configuring appropriate firewall rules. If the Cyrus IMAP service is not essential, consider disabling it. To disable the `cyrus-imapd` service, execute `sudo systemctl stop cyrus-imapd` and `sudo systemctl disable cyrus-imapd`. Disabling the service will prevent all mail access via IMAP and may require a system restart to fully take effect.
    Full advisory and evidenceOpen source bulletin

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