GHSA-x3rh-m7vp-35f2 · Severity: critical · Ecosystem: maven — Operation on a Resource after Expiration or Release in Jetty Server
In Eclipse Jetty, versions 9.4.27.v20200227 to 9.4.29.v20200521, in case of too large response headers, Jetty throws an exception to produce an HTTP 431 error. When this happens, the ByteBuffer containing the HTTP response headers is released back to the ByteBufferPool twice. Because of this double release, two threads can acquire the same ByteBuffer from the pool and while thread1 is about to use the ByteBuffer to write response1 data, thread2 fills the ByteBuffer with other data. Thread1 then proceeds to write the buffer that now contains different data. This results in client1, which issued request1 seeing data from another request or response which could contain sensitive data belonging to client2 (HTTP session ids, authentication credentials, etc.). If the Jetty version cannot be upgraded, the vulnerability can be significantly reduced by configuring a responseHeaderSize significantly larger than the requestHeaderSize (12KB responseHeaderSize and 8KB requestHeaderSize).
Conclusion & alert: CVE-2019-17638 is rated High Risk (66/100): CVSS Critical severity, with high exploitation likelihood (EPSS 11.14%, 95th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
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 | 30.93% | 11.14% | -19.79% |
| 2 | 2026-03-04 | 25.78% | 30.93% | +5.15% |
| 3 | 2026-03-01 | — | 25.78% | — |
Full EPSS history (50 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.4 | 3.1 | CRITICAL |
|
3.9 | 5.5 | [email protected] |
| 7.5 | 2.0 | HIGH |
|
10.0 | 6.4 | [email protected] |
GHSA-x3rh-m7vp-35f2 · Severity: critical · Ecosystem: maven — Operation on a Resource after Expiration or Release in Jetty Server
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2019-17638 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-2019-17638 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2019-17638 |
ubuntu
|
medium | CVE-2019-17638 medium priority: Ubuntu including 1 source packages (jetty9), 16 status rows across 16 suites (bionic, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, trusty, upstream, xenial): ignored 7, not-affected 7, DNE 1, released 1. | https://ubuntu.com/security/CVE-2019-17638 |