CVE-2026-18661Proof of concept (PoC) published · CISASuited to automated attack · CISA

Incorrect authorization in Eclipse Foundation Org.eclipse.jetty.ee11:jetty Ee11 Annotations

CVSS score

8.8

EPSS probability

%0.3

Risk score

0.0

Published

14 h ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

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Vulnerability description

CVE AI research

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DayBreach AI Explanation

Verified against sources

Security Advisory for CVE-2026-18661

Sources read

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

In Eclipse Jetty, across various versions of jetty-annotations and jetty-eeN-annotations, Jakarta Spec authoritative url-pattern rules for mixed @ServletSecurity annotations and web.xml security-constraint definitions are not applied under specific conditions.

Why does it matter?

Failure to apply authoritative url-pattern rules can lead to bypassed security constraints and unexpected security exposure.

What should be done?

Follow vendor advisories
Check official sources for updates

Chain of evidence and sources2 verified claims

Eclipse Jetty içindeki jetty-annotations ve jetty-eeN-annotations sürümleri etkilenmektedir.

S0 · daybreach-canonical S1 · nvd

Yama durumu resmî kaynaklarda UNKNOWN olarak değerlendirilmiştir.

S0 · daybreach-canonical

Show the technical text from the sources

In Eclipse Jetty, across various versions of `jetty-annotations`, and `jetty-eeN-annotations`, the Jakarta Spec authoritative url-pattern rules for mixed `@ServletSecurity` annotation, and `web.xml` defined `security-constraint` on the same `url-pattern` were not being applied if the `web.xml` had more than 1 `url-pattern` for a servlet, and had a `security-constraint` applying to only some of those `url-pattern` definitions.

CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

CWE: CWE-863

Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-18661 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	Eclipse Foundation	org.eclipse.jetty.ee11:jetty-ee11-annotations	View
2	Eclipse Foundation	org.eclipse.jetty.ee10:jetty-ee10-annotations	View
3	Eclipse Foundation	org.eclipse.jetty.ee9:jetty-ee9-annotations	View
4	Eclipse Foundation	org.eclipse.jetty.ee8:jetty-ee8-annotations	View
5	Eclipse Foundation	org.eclipse.jetty:jetty-annotations	View

Total affected vendors: 1|Products: 5

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
8.8	CVSS V40	HIGH	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/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	NVD
8.8	CVSS V4_0	HIGH	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N	CVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-18661 is associated with the following CWEs:

CWE-863: Common Weakness Enumeration Entry CWE-863

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-18661 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

UserGerekmiyor

Official Sources and Advisories

https://github.com/jetty/jetty.project/security/advisories/GHSA-v6xf-996f-c35fvendor-advisory https://gitlab.eclipse.org/security/cve-assignment/-/work_items/211vendor-advisory

CVSS Vector Radar Chart

8.8 / 10

Vulnerability Scoring Details

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone required

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)None

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

Eclipse Foundation

Weakness Type (CWE & CAPEC)

CWE-863

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