CVE-2023-40167
Jetty accepts "+" prefixed value in Content-Length
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
Jetty is a Java based web server and servlet engine. Prior to versions 9.4.52, 10.0.16, 11.0.16, and 12.0.1, Jetty accepts the `+` character proceeding the content-length value in a HTTP/1 header field. This is more permissive than allowed by the RFC and other servers routinely reject such requests with 400 responses. There is no known exploit scenario, but it is conceivable that request smuggling could result if jetty is used in combination with a server that does not close the connection after sending such a 400 response. Versions 9.4.52, 10.0.16, 11.0.16, and 12.0.1 contain a patch for this issue. There is no workaround as there is no known exploit scenario.
Timeline
ID reserved
By GitHub_M
- 37 days later
· 37 days later
Published
- 17 months later
· 17 months 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 |
|---|---|---|---|
| GitHub_MCNA (assigner) | 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)
- 1.3% · top 30% 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
- affected >= 9.0.0, <= 9.4.51
- affected >= 10.0.0, <= 10.0.15
- affected >= 11.0.0, <= 11.0.15
- affected = 12.0.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavenorg.eclipse.jetty:jetty-httpGHSA-hmr7-m48g-48f6 (opens in a new tab)
References (4)
- https://github.com/eclipse/jetty.project/security/advisories/GHSA-hmr7-m48g-48f6 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.rfc-editor.org/rfc/rfc9110#section-8.6 (opens in a new tab)x_refsource_MISCx_transferred
- https://www.debian.org/security/2023/dsa-5507 (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2023/09/msg00039.html (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-hmr7-m48g-48f6 (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-2023-40167)Record last updated .