UnratedFix available
tomcat: Fix of 2 CVEs
Type: advisorySources: OSV
- CVE-2026-29146: change the default EncryptInterceptor cipher to AES/GCM/NoPadding and reject insecure cipher mode/padding combinations to mitigate the CBC padding oracle attack (upstream tomcat 9.0.116) - CVE-2026-34486: restore super.messageReceived() inside the try block so a failed decryption is not forwarded, closing the EncryptInterceptor fail-open bypass introduced by the CVE-2026-29146 fix (upstream tomcat 9.0.117)
- Products
- tomcat, tomcat-admin-webapps, tomcat-docs-webapp, tomcat-el-3.0-api, tomcat-jsp-2.3-api, tomcat-lib, tomcat-servlet-4.0-api, tomcat-webapps
- Affected versions
- Not specified
- Fixed versions
- 1:9.0.87-3.el9_6.3.tuxcare.els8
- CVEs
- CVE-2026-29146, CVE-2026-34486
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 10:49 UTC · Revision 1
Source evidence
- CVE-2026-29146: change the default EncryptInterceptor cipher to AES/GCM/NoPadding and reject insecure cipher mode/padding combinations to mitigate the CBC padding oracle attack (upstream tomcat 9.0.116) - CVE-2026-34486: restore super.messageReceived() inside the try block so a failed decryption is not forwarded, closing the EncryptInterceptor fail-open bypass introduced by the CVE-2026-29146 fix (upstream tomcat 9.0.117)
osv:CLSA-2026-1781108520
tomcat
Fixed versions: 1:9.0.87-3.el9_6.3.tuxcare.els8
tomcat-admin-webapps
Fixed versions: 1:9.0.87-3.el9_6.3.tuxcare.els8
tomcat-docs-webapp
Fixed versions: 1:9.0.87-3.el9_6.3.tuxcare.els8
tomcat-el-3.0-api
Fixed versions: 1:9.0.87-3.el9_6.3.tuxcare.els8
tomcat-jsp-2.3-api
Fixed versions: 1:9.0.87-3.el9_6.3.tuxcare.els8
tomcat-lib
Fixed versions: 1:9.0.87-3.el9_6.3.tuxcare.els8
tomcat-servlet-4.0-api
Fixed versions: 1:9.0.87-3.el9_6.3.tuxcare.els8
tomcat-webapps
Fixed versions: 1:9.0.87-3.el9_6.3.tuxcare.els8
Complete source record
{
"id": "3e6345c7af74f65ce40136faa7dc8d76705dee6377fb63162b4b668358fd1562",
"url": "https://osv.dev/vulnerability/CLSA-2026-1781108520",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "tomcat: Fix of 2 CVEs",
"summary": "- CVE-2026-29146: change the default EncryptInterceptor cipher to AES/GCM/NoPadding and reject insecure cipher mode/padding combinations to mitigate the CBC padding oracle attack (upstream tomcat 9.0.116) - CVE-2026-34486: restore super.messageReceived() inside the try block so a failed decryption is not forwarded, closing the EncryptInterceptor fail-open bypass introduced by the CVE-2026-29146 fix (upstream tomcat 9.0.117)",
"evidence": "osv:CLSA-2026-1781108520",
"products": [
{
"name": {
"value": "tomcat",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:9.0.87-3.el9_6.3.tuxcare.els8",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tomcat-admin-webapps",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:9.0.87-3.el9_6.3.tuxcare.els8",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tomcat-docs-webapp",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:9.0.87-3.el9_6.3.tuxcare.els8",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tomcat-el-3.0-api",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:9.0.87-3.el9_6.3.tuxcare.els8",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tomcat-jsp-2.3-api",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:9.0.87-3.el9_6.3.tuxcare.els8",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tomcat-lib",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:9.0.87-3.el9_6.3.tuxcare.els8",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tomcat-servlet-4.0-api",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:9.0.87-3.el9_6.3.tuxcare.els8",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tomcat-webapps",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1:9.0.87-3.el9_6.3.tuxcare.els8",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1781108520",
"aliases": [
"CLSA-2026-1781108520"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.0.87-3.el9_6.3.tuxcare.els8"
}
]
}
],
"package": {
"name": "tomcat",
"purl": "pkg:rpm/tuxcare/tomcat?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1781108520.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.0.87-3.el9_6.3.tuxcare.els8"
}
]
}
],
"package": {
"name": "tomcat-admin-webapps",
"purl": "pkg:rpm/tuxcare/tomcat-admin-webapps?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1781108520.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.0.87-3.el9_6.3.tuxcare.els8"
}
]
}
],
"package": {
"name": "tomcat-docs-webapp",
"purl": "pkg:rpm/tuxcare/tomcat-docs-webapp?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1781108520.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.0.87-3.el9_6.3.tuxcare.els8"
}
]
}
],
"package": {
"name": "tomcat-el-3.0-api",
"purl": "pkg:rpm/tuxcare/tomcat-el-3.0-api?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1781108520.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.0.87-3.el9_6.3.tuxcare.els8"
}
]
}
],
"package": {
"name": "tomcat-jsp-2.3-api",
"purl": "pkg:rpm/tuxcare/tomcat-jsp-2.3-api?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1781108520.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.0.87-3.el9_6.3.tuxcare.els8"
}
]
}
],
"package": {
"name": "tomcat-lib",
"purl": "pkg:rpm/tuxcare/tomcat-lib?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1781108520.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.0.87-3.el9_6.3.tuxcare.els8"
}
]
}
],
"package": {
"name": "tomcat-servlet-4.0-api",
"purl": "pkg:rpm/tuxcare/tomcat-servlet-4.0-api?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1781108520.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.0.87-3.el9_6.3.tuxcare.els8"
}
]
}
],
"package": {
"name": "tomcat-webapps",
"purl": "pkg:rpm/tuxcare/tomcat-webapps?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1781108520.json"
}
}
],
"modified": "2026-10-26T09:31:08.562730882Z",
"provider": "osv",
"upstream": [
"CVE-2026-29146",
"CVE-2026-34486"
],
"references": [
"https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1781108520.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-29146",
"https://nvd.nist.gov/vuln/detail/CVE-2026-34486"
]
},
"related_cves": [
{
"value": "CVE-2026-29146",
"evidence": "/upstream"
},
{
"value": "CVE-2026-34486",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 447463,
"published_at": "2026-06-10T16:22:18+00:00"
}