CVE-2026-8384: In Eclipse Jetty, an HTTP URI of this form: /public;/../admin/secret.txt results in an unresolved

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MEDIUM 5.3REMOTEUPGRADE

CVE-2026-8384 is a medium-severity flaw (CVSS 5.3) affecting jetty. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Eclipse Jetty, an HTTP URI of this form: /public;/../admin/secret.txt results in an unresolved path of: /public/../admin/secret.txt instead of the expected: /admin/secret.txt Jetty itself is not affected, as it will not serve the secret.txt file because it will not pass the alias checker (only resolved resources are served). However, web applications that rely on resolved paths being provided by Jetty

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-647
Published	2026-07-14
Last modified	2026-10-24

Publisher (CNA): Eclipse Foundation · Vendor: eclipse

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-14 09:16 UTCPublished CVE record published
2026-10-24 21:10 UTCUpdated Record last modified

eclipse jetty UPGRADE

Affected: >= 12.0.0 and < 12.0.35 · >= 12.1.0 and < 12.1.9

Fixed in: 12.0.35, 12.1.9

Safe to downgrade to: a release before 12.0.0

1. Check installed version

apt-cache policy jetty || rpm -q jetty || jetty --version

2. UPGRADE to 12.0.35 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade jetty

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade jetty

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 12.0.0 (Debian / Ubuntu)

apt-cache madison jetty sudo apt install jetty=<VERSION_BEFORE_12.0.0> sudo apt-mark hold jetty

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list jetty sudo dnf downgrade jetty-<VERSION_BEFORE_12.0.0> sudo dnf versionlock add jetty

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-8384?

jetty: upgrade to 12.0.35, 12.1.9. Exact commands for each OS are on this page.

Is CVE-2026-8384 being exploited?

CVE-2026-8384 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-8384 affect?

CVE-2026-8384 affects jetty. Severity is medium (CVSS 5.3). In Eclipse Jetty, an HTTP URI of this form: /public;/../admin/secret.txt results in an unresolved path of: /public/../admin/secret.txt instead of the expected: /admin/secret.txt Jetty itself is not aff

How urgent is CVE-2026-8384?

Priority 35/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-10051 HIGH 7.5 UPGRADE In Eclipse Jetty, a first HTTP/1.1 request with trailers causes the server to retain the trailers in subsequen
CVE-2026-6790 MEDIUM 5.3 UPGRADE In Eclipse Jetty, for HTTP/1, HTTP/2 and HTTP/3 requests, there is no strict check that the request authority

References

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