How severe is CVE-2026-42333?

CVE-2026-42333 has a CVSS 4.0 base score of 6.3, rated medium severity.

Is CVE-2026-42333 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-42333?

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

Does CVE-2026-42333 have an EU (EUVD) identifier?

Yes. CVE-2026-42333 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28928.

When was CVE-2026-42333 published?

CVE-2026-42333 was published on 2026-05-09 and last updated on 2026-06-17.

CVE-2026-42333

CVE-2026-42333 is a medium-severity vulnerability with a CVSS 4.0 base score of 6.3. 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-200.

Key facts

Severity: Medium (CVSS 4.0 base score 6.3)
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28928
Weakness: CWE-200
Published: 2026-05-09
Last modified: 2026-06-17

Description

Quarkus OpenAPI Generator is Quarkus' extensions for generation of Rest Clients and server stubs generation. Prior to versions 2.11.1-lts, 2.16.0-lts, and 2.17.0, the generated authentication filter matches OpenAPI path templates too broadly when deciding whether to attach credentials. A security scheme configured for one operation can therefore be applied to a different same-method operation whose path only partially resembles the protected template, causing bearer tokens, API keys, or basic credentials to be sent to unintended endpoints. This issue has been patched in versions 2.11.1-lts, 2.16.0-lts, and 2.17.0.

Frequently asked questions

What is CVE-2026-42333?: Quarkus OpenAPI Generator is Quarkus' extensions for generation of Rest Clients and server stubs generation. Prior to versions 2.11.1-lts, 2.16.0-lts, and 2.17.0, the generated authentication filter matches OpenAPI path templates too broadly when deciding whether to attach credentials. A security scheme configured for one operation can therefore be applied to a different same-method operation whose path only partially resembles the protected template, causing bearer tokens, API keys, or basic credentials to be sent to unintended endpoints. This issue has been patched in versions 2.11.1-lts, 2.16.0-lts, and 2.17.0.
How severe is CVE-2026-42333?: CVE-2026-42333 has a CVSS 4.0 base score of 6.3, rated medium severity.
Is CVE-2026-42333 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-42333?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42333 have an EU (EUVD) identifier?: Yes. CVE-2026-42333 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28928.
When was CVE-2026-42333 published?: CVE-2026-42333 was published on 2026-05-09 and last updated on 2026-06-17.

References

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