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CVE-2026-18659

MEDIUMCVSS 6.9/10EPSS 0.43%

Last modified

CVE-2026-18659 is a medium-severity vulnerability rated 6.9/10 on the CVSS scale. In Eclipse Jetty, across various versions of `jetty-security`, and `jetty-eeN-security`, and `jetty-eeN-servlet`, the Jakarta Spec constraints defined as `http-method-omission` can be bypassed by using substrings of the defined HTTP Methods.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

In Eclipse Jetty, across various versions of `jetty-security`, and `jetty-eeN-security`, and `jetty-eeN-servlet`, the Jakarta Spec constraints defined as `http-method-omission` can be bypassed by using substrings of the defined HTTP Methods.

Metrics

CVSS 4.0
6.9/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability
0.43%

35.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
Eclipse Foundation—>= 12.1.0, <= 12.1.11
Eclipse Foundation—>= 12.1.0, <= 12.1.11; >= 12.0.0, <= 12.0.38
Eclipse Foundation—>= 11.0.0, <= 11.0.32; >= 10.0.0, <= 10.0.32; >= 7.6.13, <= 9.4.64

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-18659?
In Eclipse Jetty, across various versions of `jetty-security`, and `jetty-eeN-security`, and `jetty-eeN-servlet`, the Jakarta Spec constraints defined as `http-method-omission` can be bypassed by using substrings of the defined HTTP Methods.
How severe is CVE-2026-18659?
CVE-2026-18659 has a CVSS score of 6.9/10 (MEDIUM severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.
How do I fix CVE-2026-18659?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST