ALSA-2026:68677
Vulnerability from osv_almalinux – Published: 2026-09-17 00:00 – Updated: 2026-09-25 12:35 – Source website
VLAI
Summary
Important: tomcat security update
Details
Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies.
Security Fix(es):
- tomcat-coyote: Apache Tomcat: Authentication bypass via digest authentication (CVE-2026-43512)
- tomcat-coyote: Apache Tomcat: HTTP/2 request headers not validated (CVE-2026-41293)
- tomcat-coyote: Apache Tomcat: Information disclosure due to HTTP Authentication Header exposure during WebSocket authentication. (CVE-2026-42498)
- tomcat-coyote: tomcat: Improper Authorization allows security bypass (CVE-2026-43515)
- tomcat-catalina: Apache Tomcat: Improper Handling of Case Sensitivity in LockOutRealm (CVE-2026-43513)
- tomcat: Apache Tomcat: Authentication bypass via missing critical step in JNDIRealm GSSAPI configuration (CVE-2026-55957)
- tomcat: Apache Tomcat: Security constraint bypass via improper URL encoding in rewrite valve (CVE-2026-59083)
- tomcat: Apache Tomcat: Insufficient documentation for EncryptInterceptor may lead to insecure configurations (CVE-2026-59084)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
References
{
"affected": [
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "tomcat"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.0.120-1.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "tomcat-admin-webapps"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.0.120-1.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "tomcat-docs-webapp"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.0.120-1.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "tomcat-el-3.0-api"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.0.120-1.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "tomcat-jsp-2.3-api"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.0.120-1.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "tomcat-lib"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.0.120-1.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "tomcat-servlet-4.0-api"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.0.120-1.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "tomcat-webapps"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:9.0.120-1.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"details": "Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies. \n\nSecurity Fix(es): \n\n * tomcat-coyote: Apache Tomcat: Authentication bypass via digest authentication (CVE-2026-43512)\n * tomcat-coyote: Apache Tomcat: HTTP/2 request headers not validated (CVE-2026-41293)\n * tomcat-coyote: Apache Tomcat: Information disclosure due to HTTP Authentication Header exposure during WebSocket authentication. (CVE-2026-42498)\n * tomcat-coyote: tomcat: Improper Authorization allows security bypass (CVE-2026-43515)\n * tomcat-catalina: Apache Tomcat: Improper Handling of Case Sensitivity in LockOutRealm (CVE-2026-43513)\n * tomcat: Apache Tomcat: Authentication bypass via missing critical step in JNDIRealm GSSAPI configuration (CVE-2026-55957)\n * tomcat: Apache Tomcat: Security constraint bypass via improper URL encoding in rewrite valve (CVE-2026-59083)\n * tomcat: Apache Tomcat: Insufficient documentation for EncryptInterceptor may lead to insecure configurations (CVE-2026-59084)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
"id": "ALSA-2026:68677",
"modified": "2026-09-25T12:35:22Z",
"published": "2026-09-17T00:00:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://access.redhat.com/errata/RHSA-2026:68677"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-41293"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-42498"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-43512"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-43513"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-43515"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-55957"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-59083"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-59084"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2476511"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2476513"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2476516"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2476519"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2476520"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2494669"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2499917"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2499931"
},
{
"type": "ADVISORY",
"url": "https://errata.almalinux.org/8/ALSA-2026-68677.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2024-52316.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2024-54677.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2025-46701.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2025-55668.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2025-55754.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2025-61795.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2025-66614.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2026-24733.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2026-24880.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2026-25854.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2026-29145.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2026-34483.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2026-34487.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2026-41284.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2026-43514.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2026-50229.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2026-53404.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2026-53434.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2026-55276.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2026-55955.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2026-55956.html"
}
],
"related": [
"CVE-2026-43512",
"CVE-2026-41293",
"CVE-2026-42498",
"CVE-2026-43515",
"CVE-2026-43513",
"CVE-2026-55957",
"CVE-2026-59083",
"CVE-2026-59084"
],
"summary": "Important: tomcat security update"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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