How severe is CVE-2026-42797?

CVE-2026-42797 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-42797 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42797?

CVE-2026-42797 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-2026-42797?

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

Does CVE-2026-42797 have an EU (EUVD) identifier?

Yes. CVE-2026-42797 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31702.

When was CVE-2026-42797 published?

CVE-2026-42797 was published on 2026-05-25 and last updated on 2026-06-17.

CVE-2026-42797

CVE-2026-42797 is a medium-severity vulnerability in Apache Syncope with a CVSS 3.x base score of 4.9. 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-202.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31702
Weakness: CWE-202
Affected product: Apache Syncope
Published: 2026-05-25
Last modified: 2026-06-17

Description

Exposure of Sensitive Information Through Data Queries vulnerability in Apache Syncope. An administrator with adequate entitlements for Derived Schemas can create a malicious JEXL expression which allows any administrator with sufficient entitlements for User read to access User-related security-sensitive information. 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 further restricting the JEXL expression definition.

Frequently asked questions

What is CVE-2026-42797?: Exposure of Sensitive Information Through Data Queries vulnerability in Apache Syncope. An administrator with adequate entitlements for Derived Schemas can create a malicious JEXL expression which allows any administrator with sufficient entitlements for User read to access User-related security-sensitive information. 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 further restricting the JEXL expression definition.
How severe is CVE-2026-42797?: CVE-2026-42797 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-42797 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42797?: CVE-2026-42797 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-2026-42797?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42797 have an EU (EUVD) identifier?: Yes. CVE-2026-42797 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31702.
When was CVE-2026-42797 published?: CVE-2026-42797 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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