Medium
mongo-c-driver — security advisory
An out-of-bounds read in SCRAM authentication response parsing in the MongoDB C Driver can read one byte beyond a fixed-size buffer when processing a malformed server-final message. A server or network intermediary able to provide this message before server-signature verification can cause the application using the driver to terminate. The extra byte is not returned through the protocol.
- Products
- mongo-c-driver
- Affected versions
- 1.15.0-1, 1.15.1-1, 1.15.2-1, 1.16.0-1, 1.16.1-1, 1.16.1-1build1, 1.16.1-1build2, 1.16.1-1ubuntu0.1~esm1, 1.18.0-1, 1.19.1-1, 1.19.2-1, 1.20.0-1, 1.20.0-1build1, 1.20.1-1, 1.21.0-1, 1.21.0-1build1, 1.21.0-1ubuntu0.1~esm1, 1.24.3-1, 1.24.4-1, 1.25.1-1, 1.25.2-1, 1.25.4-1, 1.26.0-1, 1.26.0-1.1ubuntu1, 1.26.0-1.1ubuntu2, 1.26.0-1.1ubuntu2+esm1, 1.30.4-1ubuntu1, 2.2.0-1, 2.2.1-1, 2.2.2-1, 2.3.1-1, 2.3.2-1, 2.3.3-1build1, 2.5.0-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-106428
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:58 UTC · Revision 1
Source evidence
An out-of-bounds read in SCRAM authentication response parsing in the MongoDB C Driver can read one byte beyond a fixed-size buffer when processing a malformed server-final message. A server or network intermediary able to provide this message before server-signature verification can cause the application using the driver to terminate. The extra byte is not returned through the protocol.
osv:UBUNTU-CVE-2026-106428
mongo-c-driver
Fixed versions: Not specified
mongo-c-driver
Fixed versions: Not specified
mongo-c-driver
Fixed versions: Not specified
mongo-c-driver
Fixed versions: Not specified
mongo-c-driver
Fixed versions: Not specified
Complete source record
{
"id": "15079922c4eee18a2d3676541ea979269a4e9e2f69c4658757227d6d42af833c",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-106428",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-106428",
"summary": "An out-of-bounds read in SCRAM authentication response parsing in the MongoDB C Driver can read one byte beyond a fixed-size buffer when processing a malformed server-final message. A server or network intermediary able to provide this message before server-signature verification can cause the application using the driver to terminate. The extra byte is not returned through the protocol.",
"evidence": "osv:UBUNTU-CVE-2026-106428",
"products": [
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"evidence": "/affected/0/versions"
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"severity": "medium",
"structured": {
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"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
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],
"package": {
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"purl": "pkg:deb/ubuntu/mongo-c-driver?arch=source&distro=esm-apps%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
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"1.15.1-1",
"1.15.2-1",
"1.16.0-1",
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"1.16.1-1build1",
"1.16.1-1build2",
"1.16.1-1ubuntu0.1~esm1"
],
"database_specific": {
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},
"ecosystem_specific": {
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},
{
"binary_name": "libmongoc-1.0-0",
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],
"modified": "2026-10-17T12:58:00.075143343Z",
"provider": "osv",
"upstream": [
"CVE-2026-106428"
],
"references": [
"https://ubuntu.com/security/CVE-2026-106428",
"https://www.cve.org/CVERecord?id=CVE-2026-106428",
"https://jira.mongodb.org/browse/CDRIVER-6370"
]
},
"related_cves": [
{
"value": "CVE-2026-106428",
"evidence": "/upstream"
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],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 357837,
"published_at": "2026-10-08T19:16:00+00:00"
}