Common Weakness Enumeration
Show details on NVD website
Back to CWE stats page
CWE-304
Missing Critical Step in Authentication
The product implements an authentication technique, but it skips a step that weakens the technique.
CVE-2026-57915 (GCVE-0-2026-57915)
Vulnerability from cvelistv5 – Published: 2026-06-26 12:09 – Updated: 2026-06-30 03:16
VLAI
Title
Apache Kerby: Kerberos Pre-Authentication Bypass
Summary
It is possible to bypass the Kerberos pre-authentication check in Apache Kerby by sending a PA-DATA with an unrecognized or unsupported type. Users are recommended to upgrade to version 2.1.2, which fixes this issue.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/1y3glgh3kzwoxo5m2… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/06/26/8 | |
| https://access.redhat.com/security/cve/CVE-2026-57915 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2493407 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Kerby |
Affected:
0 , < 2.1.2
(semver)
|
|
| Red Hat | Red Hat AMQ Clients |
cpe:/a:redhat:amq_clients:2023 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack |
cpe:/a:redhat:jbosseapxp |
|
| Red Hat | streams for Apache Kafka 2 |
cpe:/a:redhat:amq_streams:2 |
|
| Red Hat | streams for Apache Kafka 3 |
cpe:/a:redhat:amq_streams:3 |
|
| Red Hat | Red Hat Data Grid 8 |
cpe:/a:redhat:jboss_data_grid:8 |
|
| Red Hat | Red Hat Fuse 7 |
cpe:/a:redhat:jboss_fuse:7 |
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-57915",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-26T14:38:18.962338Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-26T14:38:22.809Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2026-06-26T18:36:17.839Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://www.openwall.com/lists/oss-security/2026/06/26/8"
}
],
"title": "CVE Program Container"
},
{
"affected": [
{
"cpes": [
"cpe:/a:redhat:amq_clients:2023"
],
"defaultStatus": "affected",
"product": "Red Hat AMQ Clients",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:jbosseapxp"
],
"defaultStatus": "affected",
"product": "Red Hat JBoss Enterprise Application Platform Expansion Pack",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:amq_streams:2"
],
"defaultStatus": "affected",
"product": "streams for Apache Kafka 2",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:amq_streams:3"
],
"defaultStatus": "affected",
"product": "streams for Apache Kafka 3",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:jboss_data_grid:8"
],
"defaultStatus": "unaffected",
"product": "Red Hat Data Grid 8",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:jboss_fuse:7"
],
"defaultStatus": "unaffected",
"product": "Red Hat Fuse 7",
"vendor": "Red Hat"
}
],
"datePublic": "2026-06-26T12:09:54.850Z",
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in Apache Kerby. An attacker can bypass the Kerberos pre-authentication check by sending a Pre-Authentication Data (PA-DATA) packet with an unrecognized or unsupported type. This vulnerability allows an attacker to circumvent the initial authentication step, potentially leading to unauthorized access or impersonation within a Kerberos-protected environment."
}
],
"metrics": [
{
"other": {
"content": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"value": "Important"
},
"type": "Red Hat severity rating"
}
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-358",
"description": "Improperly Implemented Security Check for Standard",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-30T03:16:14.532Z",
"orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"shortName": "redhat-SADP"
},
"references": [
{
"tags": [
"vdb-entry",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/security/cve/CVE-2026-57915"
},
{
"name": "RHBZ#2493407",
"tags": [
"issue-tracking",
"x_refsource_REDHAT"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2493407"
},
{
"tags": [
"x_sadp-csaf-vex"
],
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-57915.json"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-06-26T13:00:52.106Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2026-06-26T12:09:54.850Z",
"value": "Made public."
}
],
"title": "Apache Kerby: org.apache.kerby/kerb-server: Apache Kerby: Kerberos pre-authentication bypass via unrecognized PA-DATA",
"workarounds": [
{
"lang": "en",
"value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."
}
],
"x_adpType": "supplier",
"x_generator": {
"engine": "sadp-cli 1.0.0"
}
}
],
"cna": {
"affected": [
{
"collectionURL": "https://repo.maven.apache.org/maven2",
"defaultStatus": "unaffected",
"packageName": "org.apache.kerby:kerb-server",
"product": "Apache Kerby",
"vendor": "Apache Software Foundation",
"versions": [
{
"lessThan": "2.1.2",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "It is possible to bypass the Kerberos pre-authentication check in Apache Kerby by sending a PA-DATA with an unrecognized or unsupported type. Users are recommended to upgrade to version 2.1.2, which fixes this issue."
}
],
"value": "It is possible to bypass the Kerberos pre-authentication check in Apache Kerby by sending a PA-DATA with an unrecognized or unsupported type. Users are recommended to upgrade to version 2.1.2, which fixes this issue."
}
],
"metrics": [
{
"other": {
"content": {
"text": "important"
},
"type": "Textual description of severity"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-304",
"description": "CWE-304 Missing Critical Step in Authentication",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-26T12:09:54.850Z",
"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"shortName": "apache"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://lists.apache.org/thread/1y3glgh3kzwoxo5m2lq504cjlh1dsrfh"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Apache Kerby: Kerberos Pre-Authentication Bypass",
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"assignerShortName": "apache",
"cveId": "CVE-2026-57915",
"datePublished": "2026-06-26T12:09:54.850Z",
"dateReserved": "2026-06-26T10:43:45.288Z",
"dateUpdated": "2026-06-30T03:16:14.532Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.