Medium
389-ds-base — security advisory
A flaw was found in 389 Directory Server. During SASL PLAIN authentication, the server installs connection-level bind credentials before performing the account-lock check. If the account is subsequently found to be locked, the bind is reported as failed to the client, but the already-installed authenticated state on the connection is not reverted. A client that supplies valid credentials for an account that has been administratively locked can continue to use the same connection with that account's privileges, defeating account lock as an access-revocation control.
- Products
- 389-ds-base
- Affected versions
- 1.3.3.12-1build1, 1.3.3.13-1, 1.3.4.5-2, 1.3.4.8-1, 1.3.4.8-3, 1.3.4.8-3ubuntu1, 1.3.4.8-4, 1.3.4.9-1, 1.3.4.9-1ubuntu0.1~esm1, 1.3.7.10-1, 1.3.7.10-1ubuntu1, 1.3.7.10-1ubuntu1+esm1, 1.3.7.5-1, 1.3.7.5-1build1, 1.3.7.5-1build2, 1.3.7.9-1, 1.4.1.6-4, 1.4.1.6-4build1, 1.4.2.4-1, 1.4.2.4-1build1, 1.4.3.2-1, 1.4.3.2-1build1, 1.4.3.6-2, 1.4.3.6-2ubuntu0.1~esm1, 1.4.4.11-2build1, 1.4.4.11-2build2, 1.4.4.17-1, 2.0.11-2, 2.0.14-1, 2.0.15-1, 2.0.15-1ubuntu2, 2.3.4+dfsg1-1, 2.4.4+dfsg1-1ubuntu1, 2.4.4+dfsg1-1ubuntu4, 2.4.4+dfsg1-3, 2.4.5+dfsg1-1, 3.1.2+dfsg1-1, 3.1.2+vendor1-2, 3.1.2+vendor1-2build1, 3.3.1-3
- Fixed versions
- Not specified
- CVEs
- CVE-2026-18651
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:55 UTC · Revision 1
Source evidence
A flaw was found in 389 Directory Server. During SASL PLAIN authentication, the server installs connection-level bind credentials before performing the account-lock check. If the account is subsequently found to be locked, the bind is reported as failed to the client, but the already-installed authenticated state on the connection is not reverted. A client that supplies valid credentials for an account that has been administratively locked can continue to use the same connection with that account's privileges, defeating account lock as an access-revocation control.
osv:UBUNTU-CVE-2026-18651
389-ds-base
Fixed versions: Not specified
389-ds-base
Fixed versions: Not specified
389-ds-base
Fixed versions: Not specified
389-ds-base
Fixed versions: Not specified
389-ds-base
Fixed versions: Not specified
389-ds-base
Fixed versions: Not specified
389-ds-base
Fixed versions: Not specified
Complete source record
{
"id": "39f66c2f10bdbe4b190dcff5a39e239ae31872a0640b69facb4b6427f62ab342",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-18651",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-18651",
"summary": "A flaw was found in 389 Directory Server. During SASL PLAIN authentication, the server installs connection-level bind credentials before performing the account-lock check. If the account is subsequently found to be locked, the bind is reported as failed to the client, but the already-installed authenticated state on the connection is not reverted. A client that supplies valid credentials for an account that has been administratively locked can continue to use the same connection with that account's privileges, defeating account lock as an access-revocation control.",
"evidence": "osv:UBUNTU-CVE-2026-18651",
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{
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{
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"aliases": [
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"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"
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],
"modified": "2026-10-17T12:59:53.528977730Z",
"provider": "osv",
"upstream": [
"CVE-2026-18651"
],
"references": [
"https://ubuntu.com/security/CVE-2026-18651",
"https://www.cve.org/CVERecord?id=CVE-2026-18651",
"https://bugzilla.redhat.com/show_bug.cgi?id=2510617",
"https://access.redhat.com/security/cve/CVE-2026-18651"
]
},
"related_cves": [
{
"value": "CVE-2026-18651",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 359874,
"published_at": "2026-08-03T16:16:00+00:00"
}