ESB-2026.4839

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.4839 Satellite 6.17.8 Async Update 8 May 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: Red Hat Satellite Publisher: Red Hat Operating System: Red Hat Resolution: Patch/Upgrade CVE Names: CVE-2026-25990 CVE-2026-27727 CVE-2026-27459 CVE-2025-69534 CVE-2026-33176 Original Bulletin: https://access.redhat.com/errata/RHSA-2026:14873 Comment: CVSS (Max): 8.3 CVE-2026-27727 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H) CVSS Source: Red Hat Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H EPSS (Max): 0.4% (58th) CVE-2025-69534 2026-05-07 - --------------------------BEGIN INCLUDED TEXT-------------------- RHSA-2026:14873 - Security Advisory Issued: 2026-05-07 Updated: 2026-05-07 Synopsis Satellite 6.17.8 async update Type/Severity Security Advisory: Important Topic A new release is now available for Red Hat Satellite 6.17 for RHEL 9. Description Red Hat Satellite is a system management solution that allows organizations to configure and maintain their systems without the necessity to provide public Internet access to their servers or other client systems. It performs provisioning and configuration management of predefined standard operating environments. Security Fix(es): o python-pillow: Pillow: Out-of-bounds Write via Specially Crafted PSD Image (CVE-2026-25990) o candlepin: mchange-commons-java: Arbitrary code execution via JNDI dereferencing of crafted objects (CVE-2026-27727) o python-markdown: denial of service via malformed HTML-like sequences (CVE-2025-69534) o python-pyOpenSSL: DTLS cookie callback buffer overflow (CVE-2026-27459) o rubygem-activesupport: Active Support: Denial of Service via large scientific notation strings (CVE-2026-33176) Bug Fix(es): o Satellite manifest consumer profile cert and key found in satellite client rhsm cache (SAT-43920) o All communication should happen only over https during global registration execution (SAT-43921) o Impossible to generate registration command via REST API in isolated networks managed by external capsules (SAT-43922) o Errata applicability and Refresh applicability tasks for RHEL 7 hosts runs dnf command. (SAT-43923) o BIOS info is not populated in All hosts page and in Host Details tab (SAT-43925) o Executing the 'katello::clean_backend_objects' rake task takes a long time to complete (SAT-43926) o Puppet fact parser can't create OS entry blocking Satellite leapp upgrades (SAT-43928) o No repositories available through subscriptions on a cloud-instance host after registering it to Red Hat Satellite using global registration method (SAT-43929) o Proxy password shown in clear text in the Overview page of Virt-who Configuration (SAT-43931) o Non-admin users on Satellite with viewer role, unable to see the hostgroup. (SAT-44039) Solution Before applying this update, make sure all previously released errata relevant to your system have been applied. For detailed instructions how to apply this update, refer to: https://docs.redhat.com/en/documentation/red_hat_satellite/6.17/html/ updating_red_hat_satellite/index Affected Products o Red Hat Satellite 6.17 x86_64 o Red Hat Satellite Capsule 6.17 x86_64 o Red Hat Enterprise Linux for x86_64 9 x86_64 Fixes o BZ - 2439170 - CVE-2026-25990 pillow: Pillow: Out-of-bounds Write via Specially Crafted PSD Image o BZ - 2442671 - CVE-2026-27727 com.mchange/mchange-commons-java: mchange-commons-java: Arbitrary code execution via JNDI dereferencing of crafted objects o BZ - 2444839 - CVE-2025-69534 python-markdown: denial of service via malformed HTML-like sequences o BZ - 2448503 - CVE-2026-27459 pyOpenSSL: DTLS cookie callback buffer overflow o BZ - 2450551 - CVE-2026-33176 Rails: Active Support: Active Support: Denial of Service via large scientific notation strings o SAT-43920 - Satellite manifest consumer profile cert and key found in satellite client rhsm cache [rhn_satellite_6.17] o SAT-43921 - All communication should happen only over https during global registration execution [rhn_satellite_6.17] o SAT-43922 - Impossible to generate registration command via REST API in isolated networks managed by external capsules [rhn_satellite_6.17] o SAT-43923 - Errata applicability and Refresh applicability tasks for RHEL 7 hosts runs dnf command. [rhn_satellite_6.17] o SAT-43925 - BIOS info is not populated in All hosts page and in Host Details tab [rhn_satellite_6.17] o SAT-43926 - Executing the 'katello::clean_backend_objects' rake task takes a long time to complete [rhn_satellite_6.17] o SAT-43928 - Puppet fact parser can't create OS entry blocking Satellite leapp upgrades [rhn_satellite_6.17] o SAT-43929 - No repositories available through subscriptions on a cloud-instance host after registering it to Red Hat Satellite using global registration method [rhn_satellite_6.17] o SAT-43931 - Proxy password shown in clear text in the Overview page of Virt-who Configuration [rhn_satellite_6.17] o SAT-44039 - Non-admin users on Satellite with viewer role, unable to see the hostgroup. [rhn_satellite_6.17] CVEs o CVE-2025-69534 o CVE-2026-25990 o CVE-2026-27459 o CVE-2026-27727 o CVE-2026-33176 References o https://access.redhat.com/security/updates/classification/#important - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AUSCERT's members. As AUSCERT did not write the document quoted above, AUSCERT has had no control over its content. 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