7.5

CVE-2023-46589: Apache Tomcat: HTTP request smuggling via malformed trailer headers

Modified
AliasesSUSE-SU-2024:0206-1SUSE-SU-2024:0208-1SUSE-SU-2024:0209-1
Published 28-11-2023Last modified 29-10-2025

Vulnerability summary

CVE-2023-46589 is a high (CVSS 7.5) vulnerability in apache software foundation apache tomcat. EPSS estimates a 2.65% chance of exploitation in the next 30 days, higher than 85.6% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 3% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
2.65%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 5
DSA-5665-1DSA-5667-1RHSA-2024:1318RHSA-2024:1324RHSA-2025:7497SUSE-SU-2024:0472-1

Timeline

  1. 28-11-2023
    PublishedVulnerability first disclosed.
  2. 29-10-2025
    Last modifiedVulnerability information updated.

Description

Improper Input Validation vulnerability in Apache Tomcat.Tomcat from 11.0.0-M1 through 11.0.0-M10, from 10.1.0-M1 through 10.1.15, from 9.0.0-M1 through 9.0.82 and from 8.5.0 through 8.5.95 did not correctly parse HTTP trailer headers. A trailer header that exceeded the header size limit could cause Tomcat to treat a single request as multiple requests leading to the possibility of request smuggling when behind a reverse proxy. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M11 onwards, 10.1.16 onwards, 9.0.83 onwards or 8.5.96 onwards, which fix the issue.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

2.65%

Chance of exploitation in the next 30 days

Percentile

86%

Versus all other CVEs

30-day change

No change 0.00 pp

From 2.65% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Redhat8 products
  • tomcat< 1:9.0.62-11.el9_2.4 | < 1:9.0.62-37.el9_3.2 | < 1:9.0.62-5.el8_8.3 | < 1:9.0.62-27.el8_9.3
  • tomcat-admin-webapps< 1:9.0.62-11.el9_2.4 | < 1:9.0.62-37.el9_3.2 | < 1:9.0.62-5.el8_8.3 | < 1:9.0.62-27.el8_9.3
  • tomcat-docs-webapp< 1:9.0.62-11.el9_2.4 | < 1:9.0.62-37.el9_3.2 | < 1:9.0.62-5.el8_8.3 | < 1:9.0.62-27.el8_9.3
  • tomcat-el-3.0-api< 1:9.0.62-11.el9_2.4 | < 1:9.0.62-37.el9_3.2 | < 1:9.0.62-5.el8_8.3 | < 1:9.0.62-27.el8_9.3
  • tomcat-jsp-2.3-api< 1:9.0.62-11.el9_2.4 | < 1:9.0.62-37.el9_3.2 | < 1:9.0.62-5.el8_8.3 | < 1:9.0.62-27.el8_9.3
Suse6 products
  • tomcat10&distro=SUSE Linux Enterprise Module for Web and Scripting 15 SP5< 10.1.18-150200.5.8.1
  • tomcat&distro=SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS< 9.0.36-150100.4.105.1
  • tomcat&distro=SUSE Linux Enterprise Server 12 SP5< 9.0.36-3.118.1
  • tomcat&distro=SUSE Linux Enterprise Server 15 SP1-LTSS< 9.0.36-150100.4.105.1
  • tomcat&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP5< 9.0.36-3.118.1
Ubuntu4 products
  • tomcat6All versions (No fix recorded)
  • tomcat7All versions (No fix recorded)
  • tomcat8< 8.5.39-1ubuntu1~18.04.3+esm3
  • tomcat9< 9.0.70-2ubuntu1.1 | < 9.0.16-3ubuntu0.18.04.2+esm3 | < 9.0.31-1ubuntu0.7 | < 9.0.58-1ubuntu0.1+esm3 | < 9.0.70-2ubuntu0.1
Opensuse3 products
  • tomcat10&distro=openSUSE Leap 15.5< 10.1.18-150200.5.8.1
  • tomcat10&distro=openSUSE Tumbleweed< 10.1.18-1.1
  • tomcat&distro=openSUSE Tumbleweed< 9.0.85-1.1
Debian2 products
  • tomcat10< 10.1.6-1+deb12u2 | < 10.1.16-1
  • tomcat9< 9.0.31-1~deb10u11 | < 9.0.70-2
Org.apache.tomcat2 products
  • tomcat-catalina≥ 11.0.0-M1, < 11.0.0-M11 | ≥ 10.1.0-M1, < 10.1.16 | ≥ 9.0.0-M1, < 9.0.83 | ≥ 8.5.0, < 8.5.96
  • tomcat-coyote≥ 11.0.0-M1, < 11.0.0-M11
Apache1 product
  • tomcat≥ 8.5.0, < 8.5.96 | ≥ 9.0.0, < 9.0.83 | ≥ 10.1.0, < 10.1.16 | 11.0.0:milestone1 | 11.0.0:milestone10 | 11.0.0:milestone2 | 11.0.0:milestone3 | 11.0.0:milestone4 | 11.0.0:milestone5 | 11.0.0:milestone6 | 11.0.0:milestone7 | 11.0.0:milestone8 | 11.0.0:milestone9
Apache software foundation1 product
  • apache tomcat≥ 11.0.0-M1, ≤ 11.0.0-M10 | ≥ 10.1.0-M1, ≤ 10.1.15 | ≥ 9.0.0-M1, ≤ 9.0.82 | ≥ 8.5.0, ≤ 8.5.95
Org.apache.tomcat.embed1 product
  • tomcat-embed-core≥ 11.0.0-M1, < 11.0.0-M11 | ≥ 10.1.0-M1, < 10.1.16 | ≥ 9.0.0-M1, < 9.0.83 | ≥ 8.5.0, < 8.5.96

9 vendors · 28 products

References

39 links
Show all 39 references