CVE-2023-45648
Apache Tomcat: Trailer header parsing too lenient
- Published
- Updated
- Reserved
- Assigned by
- apache
Description
Improper Input Validation vulnerability in Apache Tomcat.Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.81 and from 8.5.0 through 8.5.93 did not correctly parse HTTP trailer headers. A specially crafted, invalid trailer header 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-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fix the issue.
Timeline
ID reserved
By apache
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 5.9% · top 6.7% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
Apache Software Foundation · Apache Tomcat
- affected 11.0.0-M1 – ≤ 11.0.0-M11
- affected 10.1.0-M1 – ≤ 10.1.13
- affected 9.0.0-M1 – ≤ 9.0.81
- affected 8.5.0 – ≤ 8.5.93
- unknown 3 – < 8.5.0
- unknown 10.0.0-M1 – ≤ 10.0.27
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavenorg.apache.tomcat.embed:tomcat-embed-coreGHSA-r6j3-px5g-cq3x (opens in a new tab)
- Mavenorg.apache.tomcat:tomcatGHSA-r6j3-px5g-cq3x (opens in a new tab)
- Mavenorg.apache.tomcat:tomcat-coyoteGHSA-r6j3-px5g-cq3x (opens in a new tab)
References (6)
- https://lists.apache.org/thread/2pv8yz1pyp088tsxfb7ogltk9msk0jdp (opens in a new tab)vendor-advisoryx_transferred
- http://www.openwall.com/lists/oss-security/2023/10/10/10 (opens in a new tab)x_transferred
- https://www.debian.org/security/2023/dsa-5522 (opens in a new tab)x_transferred
- https://www.debian.org/security/2023/dsa-5521 (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2023/10/msg00020.html (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20231103-0007/ (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-r6j3-px5g-cq3x (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-45648)Record last updated .