CVE-2026-8384: jetty — Exploit & Fix

Description

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 may be confused when receiving an unresolved path.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS — Exploit Prediction

0.0020

Probability of exploitation

0.10%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-647 CWE-647

Affected Products

Vendor	Product	Versions
eclipse	jetty	12.0.0 — 12.0.35
eclipse	jetty	12.1.0 — 12.1.9

References

Advisories & Patches

https://gitlab.eclipse.org/security/cve-assignment/-/work_items/108

Exploits

https://gitlab.eclipse.org/security/cve-assignment/-/work_items/108

Frequently Asked Questions

What is CVE-2026-8384? +

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 may be confused when receiving an unresolved path. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-8384? +

CVE-2026-8384 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0020, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-8384? +

CVE-2026-8384 affects products from eclipse, specifically: jetty. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-8384? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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