How severe is CVE-2026-42782?

CVE-2026-42782 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-42782 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42782?

CVE-2026-42782 primarily affects Apache Syncope. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-42782?

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-2026-42782 have an EU (EUVD) identifier?

Yes. CVE-2026-42782 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31696.

When was CVE-2026-42782 published?

CVE-2026-42782 was published on 2026-05-25 and last updated on 2026-06-17.

CVE-2026-42782

CVE-2026-42782 is a high-severity vulnerability in Apache Syncope with a CVSS 3.x base score of 7.2. 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-653.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31696
Weakness: CWE-653
Affected product: Apache Syncope
Published: 2026-05-25
Last modified: 2026-06-17

Description

Improper Isolation or Compartmentalization vulnerability in Apache Syncope. An administrator with adequate entitlements for Implementations can create a malicious Groovy class containing untrusted code reaching a non-sandboxed execution path via the class static initializer. This issue affects Apache Syncope: 3.0 through 3.0.16, 4.0 through 4.0.5, 4.1.0. Users are recommended to upgrade to version 4.0.6 / 4.1.1, which fix this issue by forcing even the static initializer in Groovy code to run in a sandbox.

Frequently asked questions

What is CVE-2026-42782?: Improper Isolation or Compartmentalization vulnerability in Apache Syncope. An administrator with adequate entitlements for Implementations can create a malicious Groovy class containing untrusted code reaching a non-sandboxed execution path via the class static initializer. This issue affects Apache Syncope: 3.0 through 3.0.16, 4.0 through 4.0.5, 4.1.0. Users are recommended to upgrade to version 4.0.6 / 4.1.1, which fix this issue by forcing even the static initializer in Groovy code to run in a sandbox.
How severe is CVE-2026-42782?: CVE-2026-42782 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-42782 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42782?: CVE-2026-42782 primarily affects Apache Syncope. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-42782?: 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-2026-42782 have an EU (EUVD) identifier?: Yes. CVE-2026-42782 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31696.
When was CVE-2026-42782 published?: CVE-2026-42782 was published on 2026-05-25 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:apache:syncope:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:syncope:4.1.0:*:*:*:*:*:*:*

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