CVE catalog

CVE-2019-17638

jetty9: CVE-2019-17638

Severity: High · CVSS 7.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
Published: Jan 1, 2019, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 11.14% · Oct 25, 2026

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).

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	jetty9	sid	`9.4.58-2`	fixed
Debian	jetty9	forky	`9.4.58-2`	fixed
Debian	jetty9	trixie	`9.4.57-1.1~deb13u1`	fixed
Debian	jetty9	trixie-security	`9.4.57-1.1~deb13u1`	fixed
Debian	jetty9	bookworm	`9.4.57-1.1~deb12u1`	fixed
Debian	jetty9	bookworm-security	`9.4.57-1.1~deb12u1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	jetty9	source	sid	`9.4.31-1`	not yet assigned	Not reported	Not reported
Debian	jetty9	source	forky	`9.4.31-1`	not yet assigned	Not reported	Not reported
Debian	jetty9	source	trixie	`9.4.31-1`	not yet assigned	Not reported	Not reported
Debian	jetty9	source	bookworm	`9.4.31-1`	not yet assigned	Not reported	Not reported

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[jetty9]Unknown
Details (4)
- 9.4.57-1.1~deb12u1 · all · bookworm
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm-security
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm-security
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
[libjetty9-extra-java]Unknown
Source package: [jetty9]
Details (4)
- 9.4.57-1.1~deb12u1 · all · bookworm
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm-security
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm-security
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
[libjetty9-java]Unknown
Source package: [jetty9]
Details (4)
- 9.4.57-1.1~deb12u1 · all · bookworm
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm-security
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm-security
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12

[Debian 13 (Trixie)]

[jetty9]Unknown
Details (4)
- 9.4.57-1.1~deb13u1 · all · trixie
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie-security
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie-security
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · 13
[libjetty9-extra-java]Unknown
Source package: [jetty9]
Details (4)
- 9.4.57-1.1~deb13u1 · all · trixie
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie-security
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie-security
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · 13
[libjetty9-java]Unknown
Source package: [jetty9]
Details (4)
- 9.4.57-1.1~deb13u1 · all · trixie
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie-security
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie-security
  Fixed · Fixed: 9.4.31-1
  dsa · jetty9 · debian · 13

Observed: Oct 23, 2026, 5:41:50 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]