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026-18922","name":"CVE 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During SASL PLAIN authentication, a stale identity carried in a Cyrus SASL auxiliary property from a prior failed bind attempt can be installed on a connection following a subsequent, unrelated successful bind, regardless of which SASL mechanism completes that second bind. An attacker can send a SASL PLAIN bind as cn=Directory Manager with an incorrect password, then complete a SASL ANONYMOUS bind on the same connection, causing the server to grant Directory Manager authority without any valid credentials. 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Since the exploit chain requires the first bind attempt to be a failed SASL PLAIN bind as cn=Directory Manager, removing PLAIN from the allowed mechanism list prevents that step entirely — this blocks both the originally reported variant (valid low-privileged account) and the zero-credential SASL ANONYMOUS variant, since both depend on the same initial PLAIN bind to plant the stale identity."}],"x_generator":{"engine":"cvelib 1.8.0"},"x_redhatCweChain":"CWE-287: Improper Authentication"}},"cveMetadata":{"assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","assignerShortName":"redhat","cveId":"CVE-2026-18922","datePublished":"2026-09-07T14:14:53.799Z","dateReserved":"2026-08-05T08:26:17.044Z","dateUpdated":"2026-09-08T07:56:35.381Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-07 15:17:31","lastModifiedDate":"2026-09-08 08:17:10","problem_types":["CWE-287","CWE-287 Improper Authentication"],"metrics":{"cvssMetricV31":[{"source":"secalert@redhat.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"18922","Ordinal":"1","Title":"389-ds-base: 389-ds-base: sasl plain authentication allows privi","CVE":"CVE-2026-18922","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"18922","Ordinal":"1","NoteData":"A flaw was found in 389 Directory Server. During SASL PLAIN authentication, a stale identity carried in a Cyrus SASL auxiliary property from a prior failed bind attempt can be installed on a connection following a subsequent, unrelated successful bind, regardless of which SASL mechanism completes that second bind. An attacker can send a SASL PLAIN bind as cn=Directory Manager with an incorrect password, then complete a SASL ANONYMOUS bind on the same connection, causing the server to grant Directory Manager authority without any valid credentials. A variant using a valid low-privileged account's own successful bind instead of an anonymous one is also possible.","Type":"Description","Title":"389-ds-base: 389-ds-base: sasl plain authentication allows privi"}]}}}