How severe is CVE-2026-40127?

CVE-2026-40127 has a CVSS 4.0 base score of 5.3, rated medium severity.

Is CVE-2026-40127 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-40127?

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

Does CVE-2026-40127 have an EU (EUVD) identifier?

Yes. CVE-2026-40127 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31662.

When was CVE-2026-40127 published?

CVE-2026-40127 was published on 2026-05-25 and last updated on 2026-06-17.

CVE-2026-40127

CVE-2026-40127 is a medium-severity vulnerability with a CVSS 4.0 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-639.

Key facts

Severity: Medium (CVSS 4.0 base score 5.3)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31662
Weakness: CWE-639
Published: 2026-05-25
Last modified: 2026-06-17

Description

OutSystems Lifetime is vulnerable to Authorization Bypass Through User-Controlled Key vulnerability in ApplicationID parameter. Any authenticated user, can read the Change Log containing actions performed by other users as well as application name of any application. This issue was fixed in OutSystems Lifetime version 11.28.2.3955

Frequently asked questions

What is CVE-2026-40127?: OutSystems Lifetime is vulnerable to Authorization Bypass Through User-Controlled Key vulnerability in ApplicationID parameter. Any authenticated user, can read the Change Log containing actions performed by other users as well as application name of any application. This issue was fixed in OutSystems Lifetime version 11.28.2.3955
How severe is CVE-2026-40127?: CVE-2026-40127 has a CVSS 4.0 base score of 5.3, rated medium severity.
Is CVE-2026-40127 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-40127?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-40127 have an EU (EUVD) identifier?: Yes. CVE-2026-40127 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31662.
When was CVE-2026-40127 published?: CVE-2026-40127 was published on 2026-05-25 and last updated on 2026-06-17.

References

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