UnratedFix available
Fix CVE(s): CVE-2026-55956, CVE-2026-55957
Type: advisorySources: OSV
* SECURITY UPDATE: authentication bypass in JNDIRealm with GSSAPI - debian/patches/CVE-2026-55957.patch: don't reuse GSSAPI SASL auth when validating user credentials in java/org/apache/catalina/realm/JNDIRealm.java - CVE-2026-55957 * SECURITY UPDATE: default servlet security constraint method bypass - debian/patches/CVE-2026-55956.patch: honour per-method constraints mapped to "/" in java/org/apache/catalina/realm/RealmBase.java - CVE-2026-55956
- Products
- libservlet3.0-java, libservlet3.0-java-doc, libtomcat7-java, tomcat7, tomcat7-admin, tomcat7-common, tomcat7-docs, tomcat7-examples, tomcat7-user
- Affected versions
- Not specified
- Fixed versions
- 7.0.68-1ubuntu0.4+tuxcare.els9
- CVEs
- CVE-2026-55956, CVE-2026-55957
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:08 UTC · Revision 1
Source evidence
Fix CVE(s): CVE-2026-55956, CVE-2026-55957
core-osv · Original sourcePublished 10 Jul 2026, 12:49 UTC
* SECURITY UPDATE: authentication bypass in JNDIRealm with GSSAPI - debian/patches/CVE-2026-55957.patch: don't reuse GSSAPI SASL auth when validating user credentials in java/org/apache/catalina/realm/JNDIRealm.java - CVE-2026-55957 * SECURITY UPDATE: default servlet security constraint method bypass - debian/patches/CVE-2026-55956.patch: honour per-method constraints mapped to "/" in java/org/apache/catalina/realm/RealmBase.java - CVE-2026-55956
osv:CLSA-2026-1783686686
libservlet3.0-java
Fixed versions: 7.0.68-1ubuntu0.4+tuxcare.els9
libservlet3.0-java-doc
Fixed versions: 7.0.68-1ubuntu0.4+tuxcare.els9
libtomcat7-java
Fixed versions: 7.0.68-1ubuntu0.4+tuxcare.els9
tomcat7
Fixed versions: 7.0.68-1ubuntu0.4+tuxcare.els9
tomcat7-admin
Fixed versions: 7.0.68-1ubuntu0.4+tuxcare.els9
tomcat7-common
Fixed versions: 7.0.68-1ubuntu0.4+tuxcare.els9
tomcat7-docs
Fixed versions: 7.0.68-1ubuntu0.4+tuxcare.els9
tomcat7-examples
Fixed versions: 7.0.68-1ubuntu0.4+tuxcare.els9
tomcat7-user
Fixed versions: 7.0.68-1ubuntu0.4+tuxcare.els9
Complete source record
{
"id": "21884d1a1993ae23855a808550aa6f490585ef3ac76d9e2488448f0e2ffc7a6d",
"url": "https://osv.dev/vulnerability/CLSA-2026-1783686686",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix CVE(s): CVE-2026-55956, CVE-2026-55957",
"summary": "* SECURITY UPDATE: authentication bypass in JNDIRealm with GSSAPI - debian/patches/CVE-2026-55957.patch: don't reuse GSSAPI SASL auth when validating user credentials in java/org/apache/catalina/realm/JNDIRealm.java - CVE-2026-55957 * SECURITY UPDATE: default servlet security constraint method bypass - debian/patches/CVE-2026-55956.patch: honour per-method constraints mapped to \"/\" in java/org/apache/catalina/realm/RealmBase.java - CVE-2026-55956",
"evidence": "osv:CLSA-2026-1783686686",
"products": [
{
"name": {
"value": "libservlet3.0-java",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.0.68-1ubuntu0.4+tuxcare.els9",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libservlet3.0-java-doc",
"evidence": "/affected/1/package/name"
},
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{
"value": "7.0.68-1ubuntu0.4+tuxcare.els9",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libtomcat7-java",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.0.68-1ubuntu0.4+tuxcare.els9",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tomcat7",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.0.68-1ubuntu0.4+tuxcare.els9",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tomcat7-admin",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.0.68-1ubuntu0.4+tuxcare.els9",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tomcat7-common",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.0.68-1ubuntu0.4+tuxcare.els9",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tomcat7-docs",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.0.68-1ubuntu0.4+tuxcare.els9",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tomcat7-examples",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.0.68-1ubuntu0.4+tuxcare.els9",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tomcat7-user",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.0.68-1ubuntu0.4+tuxcare.els9",
"evidence": "/affected/8/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1783686686",
"aliases": [
"CLSA-2026-1783686686"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.0.68-1ubuntu0.4+tuxcare.els9"
}
]
}
],
"package": {
"name": "libservlet3.0-java",
"purl": "pkg:deb/tuxcare/libservlet3.0-java?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1783686686.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.0.68-1ubuntu0.4+tuxcare.els9"
}
]
}
],
"package": {
"name": "libservlet3.0-java-doc",
"purl": "pkg:deb/tuxcare/libservlet3.0-java-doc?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1783686686.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.0.68-1ubuntu0.4+tuxcare.els9"
}
]
}
],
"package": {
"name": "libtomcat7-java",
"purl": "pkg:deb/tuxcare/libtomcat7-java?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1783686686.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.0.68-1ubuntu0.4+tuxcare.els9"
}
]
}
],
"package": {
"name": "tomcat7",
"purl": "pkg:deb/tuxcare/tomcat7?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1783686686.json"
}
},
{
"ranges": [
{
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"events": [
{
"introduced": "0"
},
{
"fixed": "7.0.68-1ubuntu0.4+tuxcare.els9"
}
]
}
],
"package": {
"name": "tomcat7-admin",
"purl": "pkg:deb/tuxcare/tomcat7-admin?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1783686686.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.0.68-1ubuntu0.4+tuxcare.els9"
}
]
}
],
"package": {
"name": "tomcat7-common",
"purl": "pkg:deb/tuxcare/tomcat7-common?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1783686686.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.0.68-1ubuntu0.4+tuxcare.els9"
}
]
}
],
"package": {
"name": "tomcat7-docs",
"purl": "pkg:deb/tuxcare/tomcat7-docs?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1783686686.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.0.68-1ubuntu0.4+tuxcare.els9"
}
]
}
],
"package": {
"name": "tomcat7-examples",
"purl": "pkg:deb/tuxcare/tomcat7-examples?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1783686686.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.0.68-1ubuntu0.4+tuxcare.els9"
}
]
}
],
"package": {
"name": "tomcat7-user",
"purl": "pkg:deb/tuxcare/tomcat7-user?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1783686686.json"
}
}
],
"modified": "2026-10-26T09:31:46.898761821Z",
"provider": "osv",
"upstream": [
"CVE-2026-55956",
"CVE-2026-55957"
],
"references": [
"https://errata.tuxcare.com/els_os/ubuntu16.04els/CLSA-2026-1783686686.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-55956",
"https://nvd.nist.gov/vuln/detail/CVE-2026-55957"
]
},
"related_cves": [
{
"value": "CVE-2026-55956",
"evidence": "/upstream"
},
{
"value": "CVE-2026-55957",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 448457,
"published_at": "2026-07-10T12:49:52+00:00"
}