synced 8 MIN AGO
01 Record

CVE-2023-45648

Apache Tomcat: Trailer header parsing too lenient

MediumPUBLISHEDCNA: apache
CNA base score5.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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02 Description

Apache Tomcat: Trailer header parsing too lenient

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
5.88% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 93.0% of scored records. A rank, not a probability.
NVD base score
5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2023-10-10 18:38Z3 YR AGO
Last updated
2025-10-29 12:00Z1 YR AGO
Reserved
2023-10-10
Assigning CNA
apache
Record state
PUBLISHED
Severity
Medium (CVSS 5.3)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weaknesses
  • CWE-20Improper Input ValidationClass
Data version
5.1
Document digest
d8335a167440d5523312d97a9cd882dbe5ac6db1dff2aa0630c5cc11672c5d41

05 Affected products

VendorProductVersionsPlatforms
Apache Software FoundationApache Tomcat11.0.0-M1 to 11.0.0-M11, 10.1.0-M1 to 10.1.13, 9.0.0-M1 to 9.0.81, 8.5.0 to 8.5.93—
apachetomcat11.0.0-m1 to 11.0.0-m11, 10.1.0-m1 to 10.1.13, 9.0.0-m1 to 9.0.81, 8.5.0 to 8.5.93—

06 References

07 Fixed in

AlmaLinux 8

  • tomcat
    Fixed in 1:9.0.62-27.el8_9.2
  • tomcat-admin-webapps
    Fixed in 1:9.0.62-27.el8_9.2
  • tomcat-docs-webapp
    Fixed in 1:9.0.62-27.el8_9.2
  • tomcat-el-3.0-api
    Fixed in 1:9.0.62-27.el8_9.2
  • tomcat-jsp-2.3-api
    Fixed in 1:9.0.62-27.el8_9.2
  • tomcat-lib
    Fixed in 1:9.0.62-27.el8_9.2
  • tomcat-servlet-4.0-api
    Fixed in 1:9.0.62-27.el8_9.2
  • tomcat-webapps
    Fixed in 1:9.0.62-27.el8_9.2

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • tomcat
    Fixed in 1:9.0.62-37.el9_3.1
  • tomcat-admin-webapps
    Fixed in 1:9.0.62-37.el9_3.1
  • tomcat-docs-webapp
    Fixed in 1:9.0.62-37.el9_3.1
  • tomcat-el-3.0-api
    Fixed in 1:9.0.62-37.el9_3.1
  • tomcat-jsp-2.3-api
    Fixed in 1:9.0.62-37.el9_3.1
  • tomcat-lib
    Fixed in 1:9.0.62-37.el9_3.1
  • tomcat-servlet-4.0-api
    Fixed in 1:9.0.62-37.el9_3.1
  • tomcat-webapps
    Fixed in 1:9.0.62-37.el9_3.1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • tomcat
    Fixed in 1:9.0.62-27.el8_9.2
  • tomcat-admin-webapps
    Fixed in 1:9.0.62-27.el8_9.2
  • tomcat-docs-webapp
    Fixed in 1:9.0.62-27.el8_9.2
  • tomcat-el-3.0-api
    Fixed in 1:9.0.62-27.el8_9.2
  • tomcat-jsp-2.3-api
    Fixed in 1:9.0.62-27.el8_9.2
  • tomcat-lib
    Fixed in 1:9.0.62-27.el8_9.2
  • tomcat-servlet-4.0-api
    Fixed in 1:9.0.62-27.el8_9.2
  • tomcat-webapps
    Fixed in 1:9.0.62-27.el8_9.2

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • tomcat
    Fixed in 1:9.0.62-37.el9_3.1
  • tomcat-admin-webapps
    Fixed in 1:9.0.62-37.el9_3.1
  • tomcat-docs-webapp
    Fixed in 1:9.0.62-37.el9_3.1
  • tomcat-el-3.0-api
    Fixed in 1:9.0.62-37.el9_3.1
  • tomcat-jsp-2.3-api
    Fixed in 1:9.0.62-37.el9_3.1
  • tomcat-lib
    Fixed in 1:9.0.62-37.el9_3.1
  • tomcat-servlet-4.0-api
    Fixed in 1:9.0.62-37.el9_3.1
  • tomcat-webapps
    Fixed in 1:9.0.62-37.el9_3.1

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • tomcat10
    Fixed in 10.1.6-1+deb12u1
  • tomcat9
    Fixed in 9.0.70-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • tomcat10
    Fixed in 10.1.14-1
  • tomcat9
    Fixed in 9.0.70-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • tomcat10
    Fixed in 10.1.14-1
  • tomcat9
    Fixed in 9.0.70-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • tomcat9
    Fixed in 9.0.31-1ubuntu0.8

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 25.10

  • tomcat9
    Fixed in 9.0.70-2ubuntu3

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • tomcat6
    No fix yet
  • tomcat7
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • tomcat7
    No fix yet
  • tomcat8
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • tomcat8
    Fixed in 8.5.39-1ubuntu1~18.04.3+esm5
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • tomcat9
    Fixed in 9.0.16-3ubuntu0.18.04.2+esm4
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 22.04 LTS

  • tomcat9
    Fixed in 9.0.58-1ubuntu0.1+esm4
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 24.04 LTS

  • tomcat9
    Fixed in 9.0.70-2ubuntu0.1+esm2
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.