CVE catalog

CVE-2021-28169

jetty9: CVE-2021-28169

Severity: Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Published: Jun 8, 2021, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 78.48% · Oct 25, 2026

For Eclipse Jetty versions <= 9.4.40, <= 10.0.2, <= 11.0.2, it is possible for requests to the ConcatServlet with a doubly encoded path to access protected resources within the WEB-INF directory. For example a request to `/concat?/%2557EB-INF/web.xml` can retrieve the web.xml file. This can reveal sensitive information regarding the implementation of a web application.

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
Ubuntu	jetty	14.04	`6.1.26-1ubuntu1`	vulnerable
Ubuntu	jetty	14.04	`6.1.26-1ubuntu1.1`	vulnerable
Ubuntu	jetty	14.04	`6.1.26-1ubuntu1.2`	vulnerable
Ubuntu	jetty8	14.04	`8.1.3-8`	vulnerable
Ubuntu	jetty8	14.04	`8.1.3-9`	vulnerable
Ubuntu	jetty	16.04	`6.1.26-5`	vulnerable
Ubuntu	jetty	16.04	`6.1.26-5ubuntu0.1`	vulnerable
Ubuntu	jetty8	16.04	`8.1.17-2`	vulnerable
Ubuntu	jetty8	16.04	`8.1.18-1`	vulnerable
Ubuntu	jetty8	16.04	`8.1.18-2`	vulnerable
Ubuntu	jetty8	16.04	`8.1.18-3`	vulnerable
Ubuntu	jetty8	16.04	`8.1.19-1`	vulnerable
Ubuntu	jetty9	16.04	`9.2.14-1`	vulnerable
Ubuntu	jetty9	18.04	`9.2.22-2`	vulnerable
Ubuntu	jetty9	18.04	`9.2.22-3`	vulnerable
Ubuntu	jetty9	18.04	`9.2.23-1`	vulnerable
Ubuntu	jetty9	18.04	`9.4.15-1~18.04.1ubuntu1`	vulnerable
Ubuntu	jetty9	20.04	`9.4.18-2build2`	vulnerable
Ubuntu	jetty9	20.04	`9.4.26-1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	jetty9	source	sid	`9.4.39-2`	not yet assigned	Not reported	[989999]
Debian	jetty9	source	forky	`9.4.39-2`	not yet assigned	Not reported	[989999]
Debian	jetty9	source	trixie	`9.4.39-2`	not yet assigned	Not reported	[989999]
Debian	jetty9	source	bookworm	`9.4.39-2`	not yet assigned	Not reported	[989999]

[Debian bug #989999]

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: 9.4.39-2
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm-security
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm-security
  Fixed · Fixed: 9.4.39-2
  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: 9.4.39-2
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm-security
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm-security
  Fixed · Fixed: 9.4.39-2
  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: 9.4.39-2
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm-security
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · bookworm; dsa · jetty9 · debian · 12
- 9.4.57-1.1~deb12u1 · all · bookworm-security
  Fixed · Fixed: 9.4.39-2
  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: 9.4.39-2
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie-security
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie-security
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · 13
[libjetty9-extra-java]Unknown
Source package: [jetty9]
Details (4)
- 9.4.57-1.1~deb13u1 · all · trixie
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie-security
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie-security
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · 13
[libjetty9-java]Unknown
Source package: [jetty9]
Details (4)
- 9.4.57-1.1~deb13u1 · all · trixie
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie-security
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · 13
- 9.4.57-1.1~deb13u1 · all · trixie-security
  Fixed · Fixed: 9.4.39-2
  dsa · jetty9 · debian · 13

Observed: Oct 23, 2026, 5:55:28 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]