How severe is CVE-2026-40180?

CVE-2026-40180 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-40180 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40180?

CVE-2026-40180 primarily affects Quarkiverse Quarkus Openapi Generator. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-40180?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-40180 have an EU (EUVD) identifier?

Yes. CVE-2026-40180 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21583.

When was CVE-2026-40180 published?

CVE-2026-40180 was published on 2026-04-10 and last updated on 2026-06-17.

CVE-2026-40180

CVE-2026-40180 is a high-severity vulnerability in Quarkiverse Quarkus Openapi Generator with a CVSS 3.x base score of 7.5. 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-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 7.7
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21583
Weakness: CWE-22
Affected product: Quarkiverse Quarkus Openapi Generator
Published: 2026-04-10
Last modified: 2026-06-17

Description

Quarkus OpenAPI Generator is Quarkus' extensions for generation of Rest Clients and server stubs generation. Prior to 2.16.0 and 2.15.0-lts, the unzip() method in ApicurioCodegenWrapper.java extracts ZIP entries without validating that the resolved file path stays within the intended output directory. At line 101, the destination is constructed as new File(toOutputDir, entry.getName()) and the content is written immediately. A malicious ZIP archive containing entries with path traversal sequences (e.g., ../../malicious.java) would write files outside the target directory. This vulnerability is fixed in 2.16.0 and 2.15.0-lts.

Frequently asked questions

What is CVE-2026-40180?: Quarkus OpenAPI Generator is Quarkus' extensions for generation of Rest Clients and server stubs generation. Prior to 2.16.0 and 2.15.0-lts, the unzip() method in ApicurioCodegenWrapper.java extracts ZIP entries without validating that the resolved file path stays within the intended output directory. At line 101, the destination is constructed as new File(toOutputDir, entry.getName()) and the content is written immediately. A malicious ZIP archive containing entries with path traversal sequences (e.g., ../../malicious.java) would write files outside the target directory. This vulnerability is fixed in 2.16.0 and 2.15.0-lts.
How severe is CVE-2026-40180?: CVE-2026-40180 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-40180 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40180?: CVE-2026-40180 primarily affects Quarkiverse Quarkus Openapi Generator. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-40180?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-40180 have an EU (EUVD) identifier?: Yes. CVE-2026-40180 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21583.
When was CVE-2026-40180 published?: CVE-2026-40180 was published on 2026-04-10 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:quarkiverse:quarkus_openapi_generator:*:*:*:*:*:*:*:*
cpe:2.3:a:quarkiverse:quarkus_openapi_generator:2.15.0:*:*:*:-:*:*:*

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