Fix of 8 CVEs
* SECURITY UPDATE: HTTP/2 header limit errors deferred until whole header block read - debian/patches/CVE-2024-24549.patch: validate headers after each HEADERS/CONTINUATION payload instead of only at end of block in java/org/apache/coyote/http2/Http2Parser.java, and swap the header emitter to the sink once validation fails in java/org/apache/coyote/http2/{Stream,Http2UpgradeHandler}.java - CVE-2024-24549 * SECURITY UPDATE: HTTP/2 active stream miscount leading to infinite connection timeout - debian/patches/CVE-2024-34750.patch: count each stream out of the active set exactly once in java/org/apache/coyote/http2/{Http2UpgradeHandler,Http2AsyncUpgradeHandler,Stream}.java - CVE-2024-34750 * SECURITY UPDATE: RCE via TOCTOU race in write-enabled default servlet on case insensitive file systems - debian/patches/CVE-2024-50379.patch: add path-keyed read/write locking via the new java/org/apache/catalina/WebResourceLockSet.java and use it in java/org/apache/catalina/webresources/{DirResourceSet,FileResource}.java - CVE-2024-50379 * SECURITY UPDATE: incomplete mitigation for CVE-2024-50379 on Java 8 and Java 11 - debian/patches/CVE-2024-56337.patch: set -Dsun.io.useCanonCaches=false before any file system access in bin/catalina.sh - CVE-2024-56337 * SECURITY UPDATE: authentication bypass when a Jakarta Authentication component throws - debian/patches/CVE-2024-52316.patch: set a 500 status when validateRequest() throws AuthException in java/org/apache/catalina/authenticator/Authentica
- Products
- libtomcat9-embed-java, libtomcat9-java, tomcat9, tomcat9-admin, tomcat9-common, tomcat9-docs, tomcat9-examples, tomcat9-user
- Affected versions
- Not specified
- Fixed versions
- 9.0.16-3ubuntu0.18.04.2+tuxcare.els18
- CVEs
- CVE-2024-24549, CVE-2024-34750, CVE-2024-50379, CVE-2024-52316, CVE-2024-56337, CVE-2025-48989, CVE-2025-55752, CVE-2026-29146
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:50 UTC · Revision 1
Source evidence
* SECURITY UPDATE: HTTP/2 header limit errors deferred until whole header block read - debian/patches/CVE-2024-24549.patch: validate headers after each HEADERS/CONTINUATION payload instead of only at end of block in java/org/apache/coyote/http2/Http2Parser.java, and swap the header emitter to the sink once validation fails in java/org/apache/coyote/http2/{Stream,Http2UpgradeHandler}.java - CVE-2024-24549 * SECURITY UPDATE: HTTP/2 active stream miscount leading to infinite connection timeout - debian/patches/CVE-2024-34750.patch: count each stream out of the active set exactly once in java/org/apache/coyote/http2/{Http2UpgradeHandler,Http2AsyncUpgradeHandler,Stream}.java - CVE-2024-34750 * SECURITY UPDATE: RCE via TOCTOU race in write-enabled default servlet on case insensitive file systems - debian/patches/CVE-2024-50379.patch: add path-keyed read/write locking via the new java/org/apache/catalina/WebResourceLockSet.java and use it in java/org/apache/catalina/webresources/{DirResourceSet,FileResource}.java - CVE-2024-50379 * SECURITY UPDATE: incomplete mitigation for CVE-2024-50379 on Java 8 and Java 11 - debian/patches/CVE-2024-56337.patch: set -Dsun.io.useCanonCaches=false before any file system access in bin/catalina.sh - CVE-2024-56337 * SECURITY UPDATE: authentication bypass when a Jakarta Authentication component throws - debian/patches/CVE-2024-52316.patch: set a 500 status when validateRequest() throws AuthException in java/org/apache/catalina/authenticator/Authentica
osv:CLSA-2026-1786359337
libtomcat9-embed-java
Fixed versions: 9.0.16-3ubuntu0.18.04.2+tuxcare.els18
libtomcat9-java
Fixed versions: 9.0.16-3ubuntu0.18.04.2+tuxcare.els18
tomcat9
Fixed versions: 9.0.16-3ubuntu0.18.04.2+tuxcare.els18
tomcat9-admin
Fixed versions: 9.0.16-3ubuntu0.18.04.2+tuxcare.els18
tomcat9-common
Fixed versions: 9.0.16-3ubuntu0.18.04.2+tuxcare.els18
tomcat9-docs
Fixed versions: 9.0.16-3ubuntu0.18.04.2+tuxcare.els18
tomcat9-examples
Fixed versions: 9.0.16-3ubuntu0.18.04.2+tuxcare.els18
tomcat9-user
Fixed versions: 9.0.16-3ubuntu0.18.04.2+tuxcare.els18
Complete source record
{
"id": "c81beb5dca0e43c601cb5257fab2f95af5c05140749f7d6926d73cf3afa867df",
"url": "https://osv.dev/vulnerability/CLSA-2026-1786359337",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix of 8 CVEs",
"summary": "* SECURITY UPDATE: HTTP/2 header limit errors deferred until whole header block read - debian/patches/CVE-2024-24549.patch: validate headers after each HEADERS/CONTINUATION payload instead of only at end of block in java/org/apache/coyote/http2/Http2Parser.java, and swap the header emitter to the sink once validation fails in java/org/apache/coyote/http2/{Stream,Http2UpgradeHandler}.java - CVE-2024-24549 * SECURITY UPDATE: HTTP/2 active stream miscount leading to infinite connection timeout - debian/patches/CVE-2024-34750.patch: count each stream out of the active set exactly once in java/org/apache/coyote/http2/{Http2UpgradeHandler,Http2AsyncUpgradeHandler,Stream}.java - CVE-2024-34750 * SECURITY UPDATE: RCE via TOCTOU race in write-enabled default servlet on case insensitive file systems - debian/patches/CVE-2024-50379.patch: add path-keyed read/write locking via the new java/org/apache/catalina/WebResourceLockSet.java and use it in java/org/apache/catalina/webresources/{DirResourceSet,FileResource}.java - CVE-2024-50379 * SECURITY UPDATE: incomplete mitigation for CVE-2024-50379 on Java 8 and Java 11 - debian/patches/CVE-2024-56337.patch: set -Dsun.io.useCanonCaches=false before any file system access in bin/catalina.sh - CVE-2024-56337 * SECURITY UPDATE: authentication bypass when a Jakarta Authentication component throws - debian/patches/CVE-2024-52316.patch: set a 500 status when validateRequest() throws AuthException in java/org/apache/catalina/authenticator/Authentica",
"evidence": "osv:CLSA-2026-1786359337",
"products": [
{
"name": {
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"evidence": "/affected/0/package/name"
},
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"evidence": "/affected/0/ranges"
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{
"name": {
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"evidence": "/affected/1/ranges"
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"affected_versions": []
},
{
"name": {
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"evidence": "/affected/2/ranges"
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"affected_versions": []
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "9.0.16-3ubuntu0.18.04.2+tuxcare.els18",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "9.0.16-3ubuntu0.18.04.2+tuxcare.els18",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tomcat9-docs",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "9.0.16-3ubuntu0.18.04.2+tuxcare.els18",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tomcat9-examples",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "9.0.16-3ubuntu0.18.04.2+tuxcare.els18",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tomcat9-user",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "9.0.16-3ubuntu0.18.04.2+tuxcare.els18",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1786359337",
"aliases": [
"CLSA-2026-1786359337"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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},
{
"fixed": "9.0.16-3ubuntu0.18.04.2+tuxcare.els18"
}
]
}
],
"package": {
"name": "libtomcat9-embed-java",
"purl": "pkg:deb/tuxcare/libtomcat9-embed-java?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1786359337.json"
}
},
{
"ranges": [
{
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"events": [
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},
{
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}
]
}
],
"package": {
"name": "libtomcat9-java",
"purl": "pkg:deb/tuxcare/libtomcat9-java?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1786359337.json"
}
},
{
"ranges": [
{
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},
{
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}
]
}
],
"package": {
"name": "tomcat9",
"purl": "pkg:deb/tuxcare/tomcat9?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1786359337.json"
}
},
{
"ranges": [
{
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{
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},
{
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}
]
}
],
"package": {
"name": "tomcat9-admin",
"purl": "pkg:deb/tuxcare/tomcat9-admin?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1786359337.json"
}
},
{
"ranges": [
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],
"package": {
"name": "tomcat9-common",
"purl": "pkg:deb/tuxcare/tomcat9-common?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1786359337.json"
}
},
{
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}
]
}
],
"package": {
"name": "tomcat9-docs",
"purl": "pkg:deb/tuxcare/tomcat9-docs?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1786359337.json"
}
},
{
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{
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}
]
}
],
"package": {
"name": "tomcat9-examples",
"purl": "pkg:deb/tuxcare/tomcat9-examples?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1786359337.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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},
{
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}
]
}
],
"package": {
"name": "tomcat9-user",
"purl": "pkg:deb/tuxcare/tomcat9-user?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1786359337.json"
}
}
],
"modified": "2026-10-26T09:43:33.048913023Z",
"provider": "osv",
"upstream": [
"CVE-2024-24549",
"CVE-2024-34750",
"CVE-2024-50379",
"CVE-2024-52316",
"CVE-2024-56337",
"CVE-2025-48989",
"CVE-2025-55752",
"CVE-2026-29146"
],
"references": [
"https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2026-1786359337.html",
"https://nvd.nist.gov/vuln/detail/CVE-2024-24549",
"https://nvd.nist.gov/vuln/detail/CVE-2024-34750",
"https://nvd.nist.gov/vuln/detail/CVE-2024-50379",
"https://nvd.nist.gov/vuln/detail/CVE-2024-52316",
"https://nvd.nist.gov/vuln/detail/CVE-2024-56337",
"https://nvd.nist.gov/vuln/detail/CVE-2025-48989",
"https://nvd.nist.gov/vuln/detail/CVE-2025-55752",
"https://nvd.nist.gov/vuln/detail/CVE-2026-29146"
]
},
"related_cves": [
{
"value": "CVE-2024-24549",
"evidence": "/upstream"
},
{
"value": "CVE-2024-34750",
"evidence": "/upstream"
},
{
"value": "CVE-2024-50379",
"evidence": "/upstream"
},
{
"value": "CVE-2024-52316",
"evidence": "/upstream"
},
{
"value": "CVE-2024-56337",
"evidence": "/upstream"
},
{
"value": "CVE-2025-48989",
"evidence": "/upstream"
},
{
"value": "CVE-2025-55752",
"evidence": "/upstream"
},
{
"value": "CVE-2026-29146",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 449985,
"published_at": "2026-08-10T10:55:54+00:00"
}