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No exploitation reportedFix available

CVE-2023-36478

No exploitation reported by the sources we read.

  • Published2023-10-10
  • WeaknessCWE-190 · CWE-400

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Eclipse Jetty provides a web server and servlet container. In versions 11.0.0 through 11.0.15, 10.0.0 through 10.0.15, and 9.0.0 through 9.4.52, an integer overflow in `MetaDataBuilder.checkSize` allows for HTTP/2 HPACK header values to exceed their size limit. `MetaDataBuilder.java` determines if a header name or value exceeds the size limit, and throws an exception if the limit is exceeded. However, when length is very large and huffman is true, the multiplication by 4 in line 295 will overflow, and length will become negative. `(_size+length)` will now be negative, and the check on line 296 will not be triggered. Furthermore, `MetaDataBuilder.checkSize` allows for user-entered HPACK header value sizes to be negative, potentially leading to a very large buffer allocation later on when the user-entered size is multiplied by 2. This means that if a user provides a negative length value (or, more precisely, a length value which, when multiplied by the 4/3 fudge factor, is negative), and this length value is a very large positive number when multiplied by 2, then the user can cause a very large buffer to be allocated on the server. Users of HTTP/2 can be impacted by a remote denial of service attack. The issue has been fixed in versions 11.0.16, 10.0.16, and 9.4.53. There are no known workarounds.

Timeline

dates in UTC
  1. 2023-10-1017:15CVE publishedNVD

Versions per branch

NVD · OSV
Debian debian linux
BranchAffectedFixed in
12.0= 12.0no fix published
10.0= 10.0no fix published
11.0= 11.0no fix published
Eclipse jetty
BranchAffectedFixed in
11.0≥ 11.0.0, < 11.0.1611.0.16
10.0≥ 10.0.0, < 10.0.1610.0.16
9.x≥ 9.3.0, < 9.4.539.4.53
Jenkins
BranchAffectedFixed in
2.428< 2.4282.428
2.414< 2.414.32.414.3

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • jettyUbuntu:16.04:LTSall versions · no fixed version listed
  • jettyUbuntu:14.04:LTSall versions · no fixed version listed
  • jetty-minimalSUSE:Linux Enterprise Server for SAP Applications 15 SP3all versions · fixed in 9.4.53-150200.3.22.1
  • jetty-minimalSUSE:Linux Enterprise Server for SAP Applications 15 SP2all versions · fixed in 9.4.53-150200.3.22.1
  • jetty-minimalSUSE:Linux Enterprise Server 15 SP3-LTSSall versions · fixed in 9.4.53-150200.3.22.1
  • jetty-minimalSUSE:Linux Enterprise Server 15 SP2-LTSSall versions · fixed in 9.4.53-150200.3.22.1
  • jetty-minimalSUSE:Linux Enterprise Module for Development Tools 15 SP5all versions · fixed in 9.4.53-150200.3.22.1
  • jetty-minimalSUSE:Linux Enterprise Module for Development Tools 15 SP4all versions · fixed in 9.4.53-150200.3.22.1

20 more package ranges on OSV.dev

Vendor advisories

  • CVE-2023-36478 Red Hat Product Security2 products fixed · 11 known affected

    jetty: hpack header values cause denial of service in http/2

    jenkins.src as a component of OpenShift Developer Tools and Services · http2-hpack as a component of Red Hat Integration Camel Quarkus 2 · jetty as a component of Red Hat JBoss Fuse 6 · +8 more

  • RHSA-2024:3354 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat Fuse 7.13.0 release and security update

  • RHSA-2023:7247 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat Fuse 7.12.1 release and security update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2024:3354 · 1 productBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  2. Vendor fix Red Hat Product Security RHSA-2023:7247 · 1 productBefore applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on. The References section of this erratum contains a download link (you must log in to download the update).
  3. Workaround from the vendor Red Hat Product Security RHSA-2024:3354 · 1 productNo mitigations are currently available for this vulnerability.
  4. No fix available, says the vendor Red Hat Product Security CVE-2023-36478 · 5 productsAffected
  5. No fix planned, says the vendor Red Hat Product Security CVE-2023-36478 · 5 productsOut of support scope
  6. No fix planned, says the vendor Red Hat Product Security CVE-2023-36478 · 1 productWill not fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.17.5known since 2026-10-23
  • NVDCVSS 3.17.5read 2026-10-23
  • CNAweakness (CWE)CWE-190, CWE-400known since 2026-10-23
  • NVDweakness (CWE)CWE-190read 2026-10-23
  • FIRST EPSSEPSS score4.8 %2026-11-06
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryHIGH2023-10-10

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2023-10-10
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-wgh7-54f2-x98r

Frequently asked questions

What is CVE-2023-36478?

Eclipse Jetty provides a web server and servlet container. In versions 11.0.0 through 11.0.15, 10.0.0 through 10.0.15, and 9.0.0 through 9.4.52, an integer overflow in `MetaDataBuilder.checkSize` allows for HTTP/2 HPACK header values to exceed their size limit. `MetaDataBuilder.java` determines if a header name or value exceeds the size limit, and throws an exception if the limit is exceeded. However, when length is very large and huffman is true, the multiplication by 4 in line 295 will overflow, and length will become negative. `(_size+length)` will now be negative, and the check on line 296 will not be triggered. Furthermore, `MetaDataBuilder.checkSize` allows for user-entered HPACK header value sizes to be negative, potentially leading to a very large buffer allocation later on when the user-entered size is multiplied by 2. This means that if a user provides a negative length value (or, more precisely, a length value which, when multiplied by the 4/3 fudge factor, is negative), and this length value is a very large positive number when multiplied by 2, then the user can cause a very large buffer to be allocated on the server. Users of HTTP/2 can be impacted by a remote denial of service attack. The issue has been fixed in versions 11.0.16, 10.0.16, and 9.4.53. There are no known workarounds.

Is CVE-2023-36478 actively exploited?

Active exploitation of CVE-2023-36478 has not been confirmed. Its EPSS score was 4.8% on 2026-11-06, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-36478?

CVE-2023-36478 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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