How severe is CVE-2026-6860?

CVE-2026-6860 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-6860 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-6860?

CVE-2026-6860 affects Eclipse Vert.x. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-6860?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-6860 have an EU (EUVD) identifier?

Yes. CVE-2026-6860 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27655.

When was CVE-2026-6860 published?

CVE-2026-6860 was published on 2026-05-06 and last updated on 2026-06-17.

CVE-2026-6860

CVE-2026-6860 is a medium-severity vulnerability in Eclipse Vert.x with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.9
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-27655
Weakness: CWE-770
Affected product: Eclipse Vert.x
Published: 2026-05-06
Last modified: 2026-06-17

Description

A TCP client can perform a TLS handshake and present the server name extension with a server name that is accepted by a server wildcard name, e.g. if the server is configured with a certificate accepting *.example.com, any XYZ.example.com where xyz is a valid name can be used.

Frequently asked questions

What is CVE-2026-6860?: A TCP client can perform a TLS handshake and present the server name extension with a server name that is accepted by a server wildcard name, e.g. if the server is configured with a certificate accepting *.example.com, any XYZ.example.com where xyz is a valid name can be used.
How severe is CVE-2026-6860?: CVE-2026-6860 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-6860 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-6860?: CVE-2026-6860 affects Eclipse Vert.x. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-6860?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-6860 have an EU (EUVD) identifier?: Yes. CVE-2026-6860 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27655.
When was CVE-2026-6860 published?: CVE-2026-6860 was published on 2026-05-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:eclipse:vert.x:*:*:*:*:*:*:*:*

More vulnerabilities in Eclipse Vert.x

CVE-2019-17640 — Critical (CVSS 9.8): In Eclipse Vert.x 3.4.x up to 3.9.4, 4.0.0.milestone1, 4.0.0.milestone2, 4.0.0.milestone3, 4.0.0.milestone4,…
CVE-2018-12544 — Critical (CVSS 9.8): In version from 3.5.Beta1 to 3.5.3 of Eclipse Vert.x, the OpenAPI XML type validator creates XML parsers without taking…
CVE-2018-12542 — Critical (CVSS 9.8): In version from 3.0.0 to 3.5.3 of Eclipse Vert.x, the StaticHandler uses external input to construct a pathname that…
CVE-2018-12540 — High (CVSS 8.8): In version from 3.0.0 to 3.5.2 of Eclipse Vert.x, the CSRFHandler do not assert that the XSRF Cookie matches the…
CVE-2025-11965 — High (CVSS 7.5): In Eclipse Vert.x versions [4.0.0, 4.5.21] and [5.0.0, 5.0.4], a StaticHandler configuration for restricting access to…
CVE-2024-8391 — High (CVSS 7.5): In Eclipse Vert.x version 4.3.0 to 4.5.9, the gRPC server does not limit the maximum length of message payload (Maven…

All CVEs affecting Eclipse Vert.x →

Other CWE-770 (Allocation of Resources Without Limits or Throttling) vulnerabilities

CVE-2026-31283 — Critical (CVSS 9.8): In Totara LMS v19.1.5 and before, the forgot password API does not implement rate limiting for the target email…
CVE-2020-37067 — Critical (CVSS 9.8): Filetto 1.0 FTP server contains a denial of service vulnerability in the FEAT command processing that allows attackers…
CVE-2021-47875 — Critical (CVSS 9.8): GeoGebra CAS Calculator 6.0.631.0 contains a denial of service vulnerability that allows attackers to crash the…
CVE-2025-11832 — Critical (CVSS 9.8): Allocation of Resources Without Limits or Throttling vulnerability in Azure Access Technology BLU-IC2, Azure Access…
CVE-2024-44241 — Critical (CVSS 9.8): The issue was addressed with improved bounds checks. This issue is fixed in iOS 18.1 and iPadOS 18.1, macOS Sequoia…
CVE-2022-3439 — Critical (CVSS 9.8): Allocation of Resources Without Limits or Throttling in GitHub repository ikus060/rdiffweb prior to 2.5.0.

Browse all CWE-770 (Allocation of Resources Without Limits or Throttling) vulnerabilities →