MediumFix available
Red Hat Security Advisory: krb5 security update
Type: advisorySources: OSV
- Products
- krb5, krb5-debuginfo, krb5-debugsource, krb5-devel, krb5-libs, krb5-libs-debuginfo, krb5-pkinit, krb5-pkinit-debuginfo, krb5-server, krb5-server-debuginfo, krb5-server-ldap, krb5-server-ldap-debuginfo, krb5-workstation, krb5-workstation-debuginfo, krb5-xrealmauthz, krb5-xrealmauthz-debuginfo, libkadm5, libkadm5-debuginfo
- Affected versions
- Not specified
- Fixed versions
- 0:1.21.3-10.el10_2
- CVEs
- CVE-2026-40355, CVE-2026-40356
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 17:44 UTC · Revision 1
Source evidence
Red Hat Security Advisory: krb5 security update
core-osv · Original sourcePublished 20 May 2026, 10:10 UTC
Red Hat Security Advisory: krb5 security update
osv:RHSA-2026:19145
krb5-debuginfo
Fixed versions: 0:1.21.3-10.el10_2
krb5-debugsource
Fixed versions: 0:1.21.3-10.el10_2
krb5-devel
Fixed versions: 0:1.21.3-10.el10_2
krb5-libs-debuginfo
Fixed versions: 0:1.21.3-10.el10_2
krb5-pkinit-debuginfo
Fixed versions: 0:1.21.3-10.el10_2
krb5-server-debuginfo
Fixed versions: 0:1.21.3-10.el10_2
krb5-server-ldap-debuginfo
Fixed versions: 0:1.21.3-10.el10_2
krb5-workstation-debuginfo
Fixed versions: 0:1.21.3-10.el10_2
krb5-xrealmauthz-debuginfo
Fixed versions: 0:1.21.3-10.el10_2
libkadm5-debuginfo
Fixed versions: 0:1.21.3-10.el10_2
krb5
Fixed versions: 0:1.21.3-10.el10_2
krb5-libs
Fixed versions: 0:1.21.3-10.el10_2
krb5-pkinit
Fixed versions: 0:1.21.3-10.el10_2
krb5-server
Fixed versions: 0:1.21.3-10.el10_2
krb5-server-ldap
Fixed versions: 0:1.21.3-10.el10_2
krb5-workstation
Fixed versions: 0:1.21.3-10.el10_2
krb5-xrealmauthz
Fixed versions: 0:1.21.3-10.el10_2
libkadm5
Fixed versions: 0:1.21.3-10.el10_2
Complete source record
{
"id": "fa7c9e7e5154fc0a1c777ed0c5c795f0768ed1b0e4d3f591591e49295dff7fa5",
"url": "https://osv.dev/vulnerability/RHSA-2026%3A19145",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Red Hat Security Advisory: krb5 security update",
"summary": "Red Hat Security Advisory: krb5 security update",
"evidence": "osv:RHSA-2026:19145",
"products": [
{
"name": {
"value": "krb5-debuginfo",
"evidence": "/affected/0/package/name"
},
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{
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"evidence": "/affected/0/ranges"
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"affected_versions": []
},
{
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},
{
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{
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{
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"evidence": "/affected/4/package/name"
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"evidence": "/affected/4/ranges"
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],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/5/package/name"
},
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{
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"evidence": "/affected/5/ranges"
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],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/6/ranges"
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],
"affected_versions": []
},
{
"name": {
"value": "krb5-workstation-debuginfo",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "krb5-xrealmauthz-debuginfo",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/8/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libkadm5-debuginfo",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:1.21.3-10.el10_2",
"evidence": "/affected/9/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "krb5",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:1.21.3-10.el10_2",
"evidence": "/affected/10/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "krb5-libs",
"evidence": "/affected/11/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:1.21.3-10.el10_2",
"evidence": "/affected/11/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "krb5-pkinit",
"evidence": "/affected/12/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:1.21.3-10.el10_2",
"evidence": "/affected/12/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "krb5-server",
"evidence": "/affected/13/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:1.21.3-10.el10_2",
"evidence": "/affected/13/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "krb5-server-ldap",
"evidence": "/affected/14/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:1.21.3-10.el10_2",
"evidence": "/affected/14/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "krb5-workstation",
"evidence": "/affected/15/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:1.21.3-10.el10_2",
"evidence": "/affected/15/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "krb5-xrealmauthz",
"evidence": "/affected/16/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:1.21.3-10.el10_2",
"evidence": "/affected/16/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libkadm5",
"evidence": "/affected/17/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:1.21.3-10.el10_2",
"evidence": "/affected/17/ranges"
}
],
"affected_versions": []
}
],
"severity": "medium",
"structured": {
"id": "RHSA-2026:19145",
"aliases": [
"RHSA-2026:19145"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0:1.21.3-10.el10_2"
}
]
}
],
"package": {
"name": "krb5-debuginfo",
"purl": "pkg:rpm/redhat/krb5-debuginfo",
"ecosystem": "Red Hat:enterprise_linux:10.2"
},
"database_specific": {
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{
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],
"package": {
"name": "krb5-debugsource",
"purl": "pkg:rpm/redhat/krb5-debugsource",
"ecosystem": "Red Hat:enterprise_linux:10.2"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:19145.json"
}
},
{
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],
"package": {
"name": "krb5-devel",
"purl": "pkg:rpm/redhat/krb5-devel",
"ecosystem": "Red Hat:enterprise_linux:10.2"
},
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{
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],
"package": {
"name": "krb5-libs-debuginfo",
"purl": "pkg:rpm/redhat/krb5-libs-debuginfo",
"ecosystem": "Red Hat:enterprise_linux:10.2"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:19145.json"
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},
{
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]
}
],
"package": {
"name": "krb5-pkinit-debuginfo",
"purl": "pkg:rpm/redhat/krb5-pkinit-debuginfo",
"ecosystem": "Red Hat:enterprise_linux:10.2"
},
"database_specific": {
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},
{
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"package": {
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"purl": "pkg:rpm/redhat/krb5-server-debuginfo",
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"package": {
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"purl": "pkg:rpm/redhat/libkadm5-debuginfo",
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"package": {
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"purl": "pkg:rpm/redhat/krb5",
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{
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]
}
],
"package": {
"name": "krb5-libs",
"purl": "pkg:rpm/redhat/krb5-libs",
"ecosystem": "Red Hat:enterprise_linux:10.2"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:19145.json"
}
},
{
"ranges": [
{
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"events": [
{
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},
{
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]
}
],
"package": {
"name": "krb5-pkinit",
"purl": "pkg:rpm/redhat/krb5-pkinit",
"ecosystem": "Red Hat:enterprise_linux:10.2"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:19145.json"
}
},
{
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}
],
"package": {
"name": "krb5-server",
"purl": "pkg:rpm/redhat/krb5-server",
"ecosystem": "Red Hat:enterprise_linux:10.2"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:19145.json"
}
},
{
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"events": [
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},
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]
}
],
"package": {
"name": "krb5-server-ldap",
"purl": "pkg:rpm/redhat/krb5-server-ldap",
"ecosystem": "Red Hat:enterprise_linux:10.2"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:19145.json"
}
},
{
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]
}
],
"package": {
"name": "krb5-workstation",
"purl": "pkg:rpm/redhat/krb5-workstation",
"ecosystem": "Red Hat:enterprise_linux:10.2"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:19145.json"
}
},
{
"ranges": [
{
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"events": [
{
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},
{
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]
}
],
"package": {
"name": "krb5-xrealmauthz",
"purl": "pkg:rpm/redhat/krb5-xrealmauthz",
"ecosystem": "Red Hat:enterprise_linux:10.2"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:19145.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
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}
]
}
],
"package": {
"name": "libkadm5",
"purl": "pkg:rpm/redhat/libkadm5",
"ecosystem": "Red Hat:enterprise_linux:10.2"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:19145.json"
}
}
],
"modified": "2026-10-15T10:14:08Z",
"provider": "osv",
"upstream": [
"CVE-2026-40355",
"CVE-2026-40356"
],
"references": [
"https://access.redhat.com/errata/RHSA-2026:19145",
"https://access.redhat.com/security/updates/classification/#important",
"https://bugzilla.redhat.com/show_bug.cgi?id=2463368",
"https://bugzilla.redhat.com/show_bug.cgi?id=2463370",
"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_19145.json",
"https://access.redhat.com/security/cve/CVE-2026-40355",
"https://www.cve.org/CVERecord?id=CVE-2026-40355",
"https://nvd.nist.gov/vuln/detail/CVE-2026-40355",
"https://cems.fun/2026/04/27/krb5-two-unauthenticated-network-vulnerabilities.html",
"https://github.com/krb5/krb5/commit/2e75f0d9362fb979f5fc92829431a590a130929f",
"https://web.mit.edu/kerberos/advisories/",
"https://access.redhat.com/security/cve/CVE-2026-40356",
"https://www.cve.org/CVERecord?id=CVE-2026-40356",
"https://nvd.nist.gov/vuln/detail/CVE-2026-40356"
]
},
"related_cves": [
{
"value": "CVE-2026-40355",
"evidence": "/upstream"
},
{
"value": "CVE-2026-40356",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 330936,
"published_at": "2026-05-20T10:10:02+00:00"
}