GHSA-wgh7-54f2-x98r · Severity: high · Ecosystem: maven — HTTP/2 HPACK integer overflow and buffer allocation
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.
Conclusion & alert: CVE-2023-36478 is rated High Exploit Risk (77.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.75%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.89% over the last day, indicating growing attacker interest. Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 1.87% | 3.75% | +1.89% |
| 2 | 2026-06-06 | 1.85% | 1.87% | +0.02% |
| 3 | 2026-06-02 | — | 1.85% | — |
Full EPSS history (53 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
GHSA-wgh7-54f2-x98r · Severity: high · Ecosystem: maven — HTTP/2 HPACK integer overflow and buffer allocation
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2023-36478: 1 source package rows (jetty-runner); 6 state rows across 6 repos (3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 6, open 0. | https://security.alpinelinux.org/vuln/CVE-2023-36478 |
debian
|
not yet assigned | CVE-2023-36478 not yet assigned priority: Debian including 1 source packages (jetty9), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2023-36478 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2023-36478 |
suse
|
high | CVE-2023-36478 severity important: SUSE including 58 source package names (jetty-annotations-9.4.53-1.1, jetty-annotations-9.4.53-150200.3.22.1, …), 234 product×package rows across 21 product lines (Image server-image, SUSE Enterprise Storage 7.1, … (21 product lines)): Fixed 234. | https://www.suse.com/security/cve/CVE-2023-36478/ |
ubuntu
|
medium | CVE-2023-36478 medium priority: Ubuntu including 1 source packages (jetty), 12 status rows across 12 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 8, needs-triage 3, ignored 1. | https://ubuntu.com/security/CVE-2023-36478 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| eclipse | jetty | >= 9.3.0, < 9.4.53 | cpe:2.3:a:eclipse:jetty:*:*:*:*:*:*:*:* |
| eclipse | jetty | >= 10.0.0, < 10.0.16 | cpe:2.3:a:eclipse:jetty:*:*:*:*:*:*:*:* |
| eclipse | jetty | >= 11.0.0, < 11.0.16 | cpe:2.3:a:eclipse:jetty:*:*:*:*:*:*:*:* |
| jenkins | jenkins | < 2.414.3 | cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:* |
| jenkins | jenkins | < 2.428 | cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:* |
| debian | debian_linux | 10.0 | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
| debian | debian_linux | 11.0 | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* |
| debian | debian_linux | 12.0 | cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://www.openwall.com/lists/oss-security/2023/10/18/4 | Mailing List Third Party Advisory |
| https://github.com/eclipse/jetty.project/pull/9634 | Issue Tracking Patch |
| https://github.com/eclipse/jetty.project/releases/tag/jetty-10.0.16 | Release Notes |
| https://github.com/eclipse/jetty.project/releases/tag/jetty-11.0.16 | Release Notes |
| https://github.com/eclipse/jetty.project/releases/tag/jetty-9.4.53.v20231009 | Release Notes |
| https://github.com/eclipse/jetty.project/security/advisories/GHSA-wgh7-54f2-x98r | Exploit Vendor Advisory |
| https://lists.debian.org/debian-lts-announce/2023/10/msg00045.html | Mailing List |
| https://security.netapp.com/advisory/ntap-20231116-0011/ | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20240621-0006/ | |
| https://www.debian.org/security/2023/dsa-5540 | Third Party Advisory |