{ "document": { "aggregate_severity": { "text": "Medium" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/rhel7els/vex/2026/cve-2026-27860-els_os-rhel7els.json" } ], "tracking": { "current_release_date": "2026-06-13T03:12:20Z", "generator": { "date": "2026-06-13T03:12:20Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-27860-ELS_OS-RHEL7ELS", "initial_release_date": "2026-03-27T09:16:00Z", "revision_history": [ { "date": "2026-03-27T09:16:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-06-13T03:12:20Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security update on 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"Red-Hat-7:dovecot-pigeonhole-1:2.2.36-8.el7.tuxcare.els1.x86_64" }, "product_reference": "dovecot-pigeonhole-1:2.2.36-8.el7.tuxcare.els1.x86_64", "relates_to_product_reference": "Red-Hat-7" }, { "category": "default_component_of", "full_product_name": { "name": "dovecot-pigeonhole-1:2.2.36-8.el7.x86_64 as a component of Red Hat Enterprise Linux 7", "product_id": "Red-Hat-7:dovecot-pigeonhole-1:2.2.36-8.el7.x86_64" }, "product_reference": "dovecot-pigeonhole-1:2.2.36-8.el7.x86_64", "relates_to_product_reference": "Red-Hat-7" }, { "category": "default_component_of", "full_product_name": { "name": "dovecot-pgsql-1:2.2.36-8.el7.tuxcare.els1.x86_64 as a component of Red Hat Enterprise Linux 7", "product_id": "Red-Hat-7:dovecot-pgsql-1:2.2.36-8.el7.tuxcare.els1.x86_64" }, "product_reference": "dovecot-pgsql-1:2.2.36-8.el7.tuxcare.els1.x86_64", "relates_to_product_reference": "Red-Hat-7" }, { "category": "default_component_of", "full_product_name": { "name": "dovecot-pgsql-1:2.2.36-8.el7.x86_64 as a component of Red Hat Enterprise Linux 7", "product_id": "Red-Hat-7:dovecot-pgsql-1:2.2.36-8.el7.x86_64" }, "product_reference": "dovecot-pgsql-1:2.2.36-8.el7.x86_64", "relates_to_product_reference": "Red-Hat-7" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-27860", "cwe": { "id": "CWE-90", "name": "Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')" }, "notes": [ { "category": "description", "text": "If auth_username_chars is empty, it is possible to inject arbitrary LDAP filter to Dovecot's LDAP authentication. This leads to potentially bypassing restrictions and allows probing of LDAP structure. Do not clear out auth_username_chars, or install fixed version. No publicly available exploits are known.", "title": "Vulnerability description" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "known_affected": [ "Red-Hat-7:dovecot-1:2.2.36-8.el7.i686", "Red-Hat-7:dovecot-1:2.2.36-8.el7.tuxcare.els1.i686", "Red-Hat-7:dovecot-1:2.2.36-8.el7.tuxcare.els1.x86_64", "Red-Hat-7:dovecot-1:2.2.36-8.el7.x86_64", "Red-Hat-7:dovecot-devel-1:2.2.36-8.el7.i686", "Red-Hat-7:dovecot-devel-1:2.2.36-8.el7.tuxcare.els1.i686", "Red-Hat-7:dovecot-devel-1:2.2.36-8.el7.tuxcare.els1.x86_64", "Red-Hat-7:dovecot-devel-1:2.2.36-8.el7.x86_64", "Red-Hat-7:dovecot-mysql-1:2.2.36-8.el7.tuxcare.els1.x86_64", "Red-Hat-7:dovecot-mysql-1:2.2.36-8.el7.x86_64", "Red-Hat-7:dovecot-pgsql-1:2.2.36-8.el7.tuxcare.els1.x86_64", "Red-Hat-7:dovecot-pgsql-1:2.2.36-8.el7.x86_64", "Red-Hat-7:dovecot-pigeonhole-1:2.2.36-8.el7.tuxcare.els1.x86_64", "Red-Hat-7:dovecot-pigeonhole-1:2.2.36-8.el7.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-27860" }, { "category": "external", "summary": "https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json", "url": "https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json" } ], "release_date": "2026-03-27T09:16:00Z", "remediations": [ { "category": "no_fix_planned", "date": "2026-06-12T12:56:36.689829Z", "details": "Low-priority: it only applies to Dovecot when LDAP authentication is in use and the auth_username_chars option has been explicitly cleared, which is a non-default configuration; with the shipped default (a restricted character set), the injection path is not reachable. Even if misconfigured, impact is limited to low confidentiality exposure (LDAP filter probing) with no integrity or availability effect. Given the need for this specific non-default setting and the absence of known exploits, this can be safely deprioritized relative to vulnerabilities enabling privilege escalation or code execution.", "product_ids": [ "Red-Hat-7:dovecot-1:2.2.36-8.el7.i686", "Red-Hat-7:dovecot-1:2.2.36-8.el7.tuxcare.els1.i686", "Red-Hat-7:dovecot-1:2.2.36-8.el7.tuxcare.els1.x86_64", "Red-Hat-7:dovecot-1:2.2.36-8.el7.x86_64", "Red-Hat-7:dovecot-devel-1:2.2.36-8.el7.i686", "Red-Hat-7:dovecot-devel-1:2.2.36-8.el7.tuxcare.els1.i686", "Red-Hat-7:dovecot-devel-1:2.2.36-8.el7.tuxcare.els1.x86_64", "Red-Hat-7:dovecot-devel-1:2.2.36-8.el7.x86_64", "Red-Hat-7:dovecot-mysql-1:2.2.36-8.el7.tuxcare.els1.x86_64", "Red-Hat-7:dovecot-mysql-1:2.2.36-8.el7.x86_64", "Red-Hat-7:dovecot-pgsql-1:2.2.36-8.el7.tuxcare.els1.x86_64", "Red-Hat-7:dovecot-pgsql-1:2.2.36-8.el7.x86_64", "Red-Hat-7:dovecot-pigeonhole-1:2.2.36-8.el7.tuxcare.els1.x86_64", "Red-Hat-7:dovecot-pigeonhole-1:2.2.36-8.el7.x86_64" ] } ], "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1" }, "products": [ "Red-Hat-7:dovecot-1:2.2.36-8.el7.i686", "Red-Hat-7:dovecot-1:2.2.36-8.el7.tuxcare.els1.i686", "Red-Hat-7:dovecot-1:2.2.36-8.el7.tuxcare.els1.x86_64", "Red-Hat-7:dovecot-1:2.2.36-8.el7.x86_64", "Red-Hat-7:dovecot-devel-1:2.2.36-8.el7.i686", "Red-Hat-7:dovecot-devel-1:2.2.36-8.el7.tuxcare.els1.i686", "Red-Hat-7:dovecot-devel-1:2.2.36-8.el7.tuxcare.els1.x86_64", "Red-Hat-7:dovecot-devel-1:2.2.36-8.el7.x86_64", "Red-Hat-7:dovecot-mysql-1:2.2.36-8.el7.tuxcare.els1.x86_64", "Red-Hat-7:dovecot-mysql-1:2.2.36-8.el7.x86_64", "Red-Hat-7:dovecot-pgsql-1:2.2.36-8.el7.tuxcare.els1.x86_64", "Red-Hat-7:dovecot-pgsql-1:2.2.36-8.el7.x86_64", "Red-Hat-7:dovecot-pigeonhole-1:2.2.36-8.el7.tuxcare.els1.x86_64", "Red-Hat-7:dovecot-pigeonhole-1:2.2.36-8.el7.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Moderate" } ] } ] }